I've been noticing over the past few years that sometimes when you re-build a ThinApp using a newer version of ThinApp it might not work correctly.
For instance, I have an in-house application (that is ThinApp'd) that I needed to change a single file on. I copied my Captured ThinApp folder over to my ThinApp VM and modified the file, and re-built the ThinApp with the latest version 5.1. Now when launching the ThinApp it gives an error saying "Class not registered." If I click the OK button it seems to function just fine. I tried re-building the ThinApp with version 5.0 and ran into the same problem, but when I tried re-building it with 4.7.2 the error message is no longer there.
I run into this from time to time with various applications, and when I can't figure it out I try different versions of ThinApp and that seems to fix the problem.
Anyone else run into this?