Don't know how good the app is -- dearly hope I never find out -- but in case it interests anyone...
The software would be portable but for the registration/activation parts, which is stored in the ProgramData folder. It's not too bad as far as new entries to the registry goes, but partly as a test, I copied the activated program's folder from a VM to a regular copy of win10, fired it up [it seemed to run fine], & activated it using the code I got via email. I had also copied the activation-related folders in ProgramData, which the app ignored, running as a demo until activated, then creating new files/folders in ProgramData.