diff --git a/li.sopht.Flashcards.json b/li.sopht.Flashcards.json
index e5d6325..9c630ed 100644
--- a/li.sopht.Flashcards.json
+++ b/li.sopht.Flashcards.json
@@ -4,8 +4,8 @@
   "runtime-version": "47",
   "sdk": "org.gnome.Sdk",
   "command": "flashcards",
+  "separate-locales": false,
   "finish-args": [
-    "--share=network",
     "--share=ipc",
     "--socket=fallback-x11",
     "--device=dri",
diff --git a/resources/ui/window.blp b/resources/ui/window.blp
index c7aeb5d..87c81f7 100644
--- a/resources/ui/window.blp
+++ b/resources/ui/window.blp
@@ -5,7 +5,7 @@ template $FlashcardsAppWindow : Adw.ApplicationWindow {
   title: _("Flashcards");
 
   Adw.Breakpoint {
-    condition ( "max-width: 400sp" )
+    condition ( "max-width: 600sp" )
     setters {
       split_view.collapsed: true;
     }
@@ -13,7 +13,7 @@ template $FlashcardsAppWindow : Adw.ApplicationWindow {
 
   Adw.NavigationSplitView split_view {
     [sidebar]
-    Adw.NavigationPage sidebar{
+    Adw.NavigationPage sidebar {
       title: _("Categories");
 
       Box {
diff --git a/src/create-category.c b/src/create-category.c
index ccba37f..787fac5 100644
--- a/src/create-category.c
+++ b/src/create-category.c
@@ -27,7 +27,7 @@ on_response(AdwAlertDialog *dialog,
             gchar *response,
             gpointer user_data)
 {
-    FlashcardsCreateCategoryDialog *self = FLASHCARDS_CREATE_CATEGORY_DIALOG(user_data);
+    FlashcardsCreateCategoryDialog *self = user_data;
 
     const gchar *category = gtk_editable_get_text(self->entry);
 
diff --git a/src/database.c b/src/database.c
index 4d6e6ae..25ec181 100644
--- a/src/database.c
+++ b/src/database.c
@@ -1,37 +1,35 @@
 #include "database.h"
 
 #include <stdio.h>
-#include <sqlite3.h>
 
-sqlite3 *db;
-
-void database_connect(const char *path)
+sqlite3 *database_connect(const char *path)
 {
-    // char *zErrMsg = 0;
-
     int rc;
 
     gchar *file = g_build_filename(path, "cards.db", NULL);
+    sqlite3 *db;
     rc = sqlite3_open(file, &db);
 
     if (rc)
     {
         fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
-        return;
+        return NULL;
     }
     else
     {
         fprintf(stderr, "Opened database successfully\n");
     }
     g_free(file);
+
+    return db;
 }
 
-void database_close()
+void database_close(sqlite3 *db)
 {
     sqlite3_close(db);
 }
 
-void database_create_tables()
+void database_create_tables(sqlite3 *db)
 {
     int rc;
     sqlite3_stmt *stmt;
@@ -69,7 +67,7 @@ void database_create_tables()
     sqlite3_finalize(stmt);
 }
 
-void database_save_category(const char *c)
+void database_save_category(sqlite3 *db, const char *c)
 {
     int rc;
     sqlite3_stmt *stmt;
@@ -94,7 +92,7 @@ void database_save_category(const char *c)
     sqlite3_finalize(stmt);
 }
 
-GArray *database_load_categories()
+GArray *database_load_categories(sqlite3 *db)
 {
     GArray *categories = g_array_new(TRUE, FALSE, sizeof(category));
 
@@ -123,7 +121,7 @@ GArray *database_load_categories()
     return categories;
 }
 
-void database_save_card(card c)
+void database_save_card(sqlite3 *db, card c)
 {
     int rc;
     sqlite3_stmt *stmt;
@@ -146,7 +144,7 @@ void database_save_card(card c)
     sqlite3_finalize(stmt);
 }
 
-GArray *database_load_cards()
+GArray *database_load_cards(sqlite3 *db)
 {
     GArray *cards = g_array_new(TRUE, FALSE, sizeof(card));
 
diff --git a/src/database.h b/src/database.h
index d0cdd76..c454123 100644
--- a/src/database.h
+++ b/src/database.h
@@ -1,4 +1,5 @@
 #include <glib.h>
+#include <sqlite3.h>
 
 typedef struct category
 {
@@ -13,16 +14,16 @@ typedef struct card
     char *solution;
 } card;
 
-void database_connect(const char *path);
+sqlite3 *database_connect(const char *path);
 
-void database_close();
+void database_close(sqlite3 *db);
 
-void database_create_tables();
+void database_create_tables(sqlite3 *db);
 
-void database_save_category();
+void database_save_category(sqlite3 *db, const char *c);
 
-GArray *database_load_categories();
+GArray *database_load_categories(sqlite3 *db);
 
-void database_save_card(card c);
+void database_save_card(sqlite3 *db, card c);
 
-GArray *database_load_cards();
\ No newline at end of file
+GArray *database_load_cards(sqlite3 *db);
\ No newline at end of file
diff --git a/src/flashcardsapp.c b/src/flashcardsapp.c
index 4d47e94..eb23c16 100644
--- a/src/flashcardsapp.c
+++ b/src/flashcardsapp.c
@@ -16,9 +16,9 @@ struct _FlashcardsApp
 G_DEFINE_TYPE(FlashcardsApp, flashcards_app, ADW_TYPE_APPLICATION);
 
 static void
-flashcards_app_quit_action(GSimpleAction *action,
-                           GVariant *parameter,
-                           gpointer user_data)
+flashcards_app_quit(__attribute__((unused)) GSimpleAction *action,
+                    __attribute__((unused)) GVariant *parameter,
+                    gpointer user_data)
 {
   FlashcardsApp *self = user_data;
   g_assert(FLASHCARDS_IS_APP(self));
@@ -26,9 +26,9 @@ flashcards_app_quit_action(GSimpleAction *action,
 }
 
 static void
-flashcards_app_about_action(GSimpleAction *action,
-                            GVariant *parameter,
-                            gpointer user_data)
+flashcards_app_about(__attribute__((unused)) GSimpleAction *action,
+                     __attribute__((unused)) GVariant *parameter,
+                     gpointer user_data)
 {
   static const char *developers[] = {"Sophie Krause", NULL};
   FlashcardsApp *self = user_data;
@@ -51,8 +51,8 @@ flashcards_app_about_action(GSimpleAction *action,
 }
 
 static const GActionEntry app_actions[] = {
-    {"quit", flashcards_app_quit_action},
-    {"about", flashcards_app_about_action},
+    {"quit", flashcards_app_quit, NULL, NULL, NULL, {0, 0, 0}},
+    {"about", flashcards_app_about, NULL, NULL, NULL, {0, 0, 0}},
 };
 
 static void
@@ -77,13 +77,12 @@ flashcards_app_activate(GApplication *app)
 
 static void
 flashcards_app_open(GApplication *app,
-                    GFile **files,
-                    int n_files,
-                    const char *hint)
+                    __attribute__((unused)) GFile **files,
+                    __attribute__((unused)) int n_files,
+                    __attribute__((unused)) const char *hint)
 {
   GList *windows;
   FlashcardsAppWindow *win;
-  int i;
 
   windows = gtk_application_get_windows(GTK_APPLICATION(app));
   if (windows)
@@ -91,9 +90,6 @@ flashcards_app_open(GApplication *app,
   else
     win = flashcards_app_window_new(FLASHCARDS_APP(app));
 
-  for (i = 0; i < n_files; i++)
-    flashcards_app_window_open(win, files[i]);
-
   gtk_window_present(GTK_WINDOW(win));
 }
 
diff --git a/src/flashcardsappwin.c b/src/flashcardsappwin.c
index b58516b..3141537 100644
--- a/src/flashcardsappwin.c
+++ b/src/flashcardsappwin.c
@@ -13,6 +13,8 @@ struct _FlashcardsAppWindow
 {
     AdwApplicationWindow parent;
 
+    sqlite3 *db;
+
     GArray *categories;
 
     AdwNavigationSplitView *split_view;
@@ -34,7 +36,7 @@ on_category_selected(GtkListBox *box, GtkListBoxRow *row, gpointer user_data)
         return;
     }
     printf("Test\n");
-    FlashcardsAppWindow *win = FLASHCARDS_APP_WINDOW(gtk_widget_get_root(GTK_WIDGET(box)));
+    FlashcardsAppWindow *win = user_data;
     adw_navigation_split_view_set_show_content(ADW_NAVIGATION_SPLIT_VIEW(win->split_view), TRUE);
 
     int id = gtk_list_box_row_get_index(gtk_list_box_get_selected_row(win->topics));
@@ -51,7 +53,7 @@ on_add_category(GtkButton *self,
 
 void flashcards_app_window_test(FlashcardsAppWindow *win, const gchar *test)
 {
-    database_save_category(test);
+    database_save_category(win->db, test);
 
     GtkWidget *child = adw_action_row_new();
     adw_preferences_row_set_title(ADW_PREFERENCES_ROW(child), test);
@@ -64,9 +66,9 @@ flashcards_app_window_init(FlashcardsAppWindow *win)
 {
     gtk_widget_init_template(GTK_WIDGET(win));
 
-    database_connect(g_get_user_data_dir());
-    database_create_tables();
-    win->categories = database_load_categories();
+    win->db = database_connect(g_get_user_data_dir());
+    database_create_tables(win->db);
+    win->categories = database_load_categories(win->db);
 
     GArray *categories = win->categories;
 
@@ -102,7 +104,3 @@ flashcards_app_window_new(FlashcardsApp *app)
 {
     return g_object_new(FLASHCARDS_APP_WINDOW_TYPE, "application", app, NULL);
 }
-
-void flashcards_app_window_open(FlashcardsAppWindow *win, GFile *file)
-{
-}
diff --git a/src/flashcardsappwin.h b/src/flashcardsappwin.h
index d3bf7f1..07854b3 100644
--- a/src/flashcardsappwin.h
+++ b/src/flashcardsappwin.h
@@ -9,8 +9,6 @@
 G_DECLARE_FINAL_TYPE(FlashcardsAppWindow, flashcards_app_window, FLASHCARDS, APP_WINDOW, AdwApplicationWindow)
 
 FlashcardsAppWindow *flashcards_app_window_new(FlashcardsApp *app);
-void flashcards_app_window_open(FlashcardsAppWindow *win,
-                                GFile *file);
 void flashcards_app_window_test(FlashcardsAppWindow *win, const gchar *test);
 
 #endif /* __FLASHCARDSAPPWIN_H */