Hi! Hmm looks like it's Apple's security being stringent because the app isn't signed with an Apple Developer certificate -- I'm working on getting my Apple Developer credentials going for Paradiso right now but until then try this:
- Open the DMG file you downloaded and drag tat.app to the Applications folder
- Open a terminal window (cmd+space, then type "terminal.app")
- In the terminal type:
xattr -c /Applications/tat.app
(If you put the tat.app somewhere else on your computer, change the "/Applications/tat.app" accordingly.)
This will remove the flag that's causing this warning and you should be able to open TAT as normal! This is a stopgap of course -- once I have my Apple Dev credentials sorted out this won't be necessary. Sorry for the hassle!