I had an important master folder with multiple subfolders that were mysteriously transferred to the trash folder. I'm not sure how to restore these folders to the regular list of folders.
When you hold the press one of the categories, it gives you an option to "Rename", "Move" and "Trash". It probably happened this way.
No worry! Here is the instruction how to move them back. In Categories menu,
1) Click on Trash > Click Edit > Select the subfolders > Click Move
2) Click + > Create Category > name it "master" Click ok.
3) Click "master" from the Categories menu > Click Done
Published: September 18th, 2018