This is on Mac (Intel) and the last two updates have shown the same - version 1.5 not 2.X. Anything specific? All updates for Pinegrow itself show the correct versions.
I’m not sure BUT I think maybe you have the 2 versions on your Mac.
There was a name change from Pinegrow Theme Converter to Theme Converter only when version 2 was released and I guess you are still starting the previous version …
Correct! Problem solved but why, Pinegrow?
Why not? 
Glad that the issue is now solved!