It wasn't mentioned anywhere on the download page, re: system requirements, however this app will not work in MacOS Catalina.

Opening the application results in the error message :

Powerglove.app needs to be updated.

The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information.

Any help from the developers regarding 

32-bit app compatibility with macOS High Sierra 10.13.4 and later

Thanks~!