Hi Paul
Thought it might be important to tell you that I also had the same problem I was pulling my hair out wondering why I could not could not export an APK file in AGKS after I updated.
I'm on Windows 7 (yeah I know I'm stuck in the past) I didn't even get a message to say that zipalign.exe was unable to start it was just saying compiled successfully but there was no APK file generated.
But it seems the libwinpthread-1.dll file was also the culprit for me. I didn't even have one inside AppGameKitStudio\media\data\android and clicking on zipalign.exe would say that libwinpthread-1.dll was missing.
I could'nt find the Android SDK folder but I found an old version of libwinpthread-1.dll in some old android software.
Dropped that into AppGameKitStudio\media\data\android folder and it now works and creates the APK.
But I'm wondering how many other people have this problem and even stranger is why so many don't seem too?
Also can you please put out an update for AppGameKit classic when you can with the new bug fixes like the SetViewOffset() causing virtual buttons to move.
it seems to be fixed in the new studio update but to be honest I feel like I trust AppGameKit Classic more for putting updates to my App that's on the Play store just for the moment.
Thanks so much for all your hard work.
Hope you all stay safe and well.