docs: Replace link that people experiencing issues can refer to

Author: mndscp

content/pages/download.md

@@ -60,9 +60,13 @@ versions:
 
               flatpak run org.mixxx.Mixxx
 
+          If you have multiple versions of the Mixxx Flatpak installed, you can run the stable version explicitly like this:
+
+              flatpak run org.mixxx.Mixxx//stable
+
           **Note:** When migrating from a distribution package or Mixxx built from source code, Mixxx Flatpak will not automatically recover your previous settings and database. Please refer to the [instructions in the manual](https://manual.mixxx.org/latest/chapters/advanced_topics#migrate-your-mixxx-library-and-settings-to-flatpak).
 
-          If you encounter issues with file or device permissions, please refer to the [Mixxx Flatpak repository](https://github.com/flathub/org.mixxx.Mixxx/issues) first.
+          If you encounter issues with file or device permissions, please refer to the [Issues section of the main Mixxx repository](https://github.com/mixxxdj/mixxx/issues) first.
       - slug: source
         name: Source Code
         icon: terminal.svg
@@ -138,7 +142,7 @@ versions:
 
           **Note:** When migrating from a distribution package or Mixxx built from source code, Mixxx Flatpak will not automatically recover your previous settings and database. Please refer to the [instructions in the manual](https://manual.mixxx.org/latest/chapters/advanced_topics#migrate-your-mixxx-library-and-settings-to-flatpak).
 
-          If you encounter issues with file or device permissions, please refer to the [Mixxx Flatpak repository](https://github.com/flathub/org.mixxx.Mixxx/issues) first.
+          If you encounter issues with file or device permissions, please refer to the [Issues section of the main Mixxx repository](https://github.com/mixxxdj/mixxx/issues) first.
       - slug: source
         name: Source Code
         icon: terminal.svg
@@ -218,7 +222,7 @@ versions:
 
           **Note:** When migrating from a distribution package or Mixxx built from source code, Mixxx Flatpak will not automatically recover your previous settings and database. Please refer to the [instructions in the manual](https://manual.mixxx.org/latest/chapters/advanced_topics#migrate-your-mixxx-library-and-settings-to-flatpak).
 
-          If you encounter issues with file or device permissions, please refer to the [Mixxx Flatpak repository](https://github.com/flathub/org.mixxx.Mixxx/issues) first.
+          If you encounter issues with file or device permissions, please refer to the [Issues section of the main Mixxx repository](https://github.com/mixxxdj/mixxx/issues) first.
       - slug: source
         name: Source Code
         icon: terminal.svg