If you wish to move your modding folder (including modpacks and all installed content) to a different location on your system, please follow these steps:

  1. Open the app's settings and go to 'Minecraft'
  2. Click 'Open' and set the folder aside (it will be needed later on)
  3. Click 'Change' and select the new location for the modding folder:

  4. Click 'Open'

  5. In your original modding folder, go to 'Instances' and copy or cut all of the folder's contents:

  6. Paste the contents into the 'Instances' subfolder in your new modding folder:

  7. Your modpacks should now appear in the app :)