Yes you can use the Restore function in the chest to send it back to the original location (if you accept the very limited risk in doing so before knowing it is clear). A copy remains in the chest, confirm it is back in the C:\Program Files\Adobe\Photoshp Album Starter Edition\3.0\Shared_Assets\locales\en_us folder, then you can delete the backup in the chest.

The suspect ‘folder’ (and the copy of abd2.exe) was to allow you to send it to virustotal (VT) without avast blocking it. Once this action is complete you can delete the copy of abd2.exe in the suspect folder provided you have your copy in the chest or original location (so you aren’t deleting the only copy).

Don’t delete the suspect folder or the exclusion for it, that way if you need to submit a file to VT you don’t have to remember how to create it and exclude it.