if you have a time machine backup you could restore this folder:
~/Library/Containers/com.sweetpproductions.Invisible
or you could also manually unhide the file(s) like so:
Open Applications/Utilities/Terminal.app
paste in this command:
defaults write com.apple.finder AppleShowAllFiles YES
press enter
relaunch the finder
locate your files
Invisible adds a . to the beginning of your files,
just remove the .
then, undo the changes:
Open Applications/Utilities/Terminal.app
paste in this command:
defaults write com.apple.finder AppleShowAllFiles NO
press enter
then relaunch the finder