Folks,
It has been a little over a month since AES Crypt 4 was released. The feedback was very positive, though there were a few issues observed. We have been making incremental updates over the past month to resolve various issues. Most significantly was a crashing issue on certain Windows machines. After spending a couple of weeks trying to isolate the issue (because it did not happen on any of our systems), we were able to narrow down the problem to a particular line of code.
Curious why, we discovered that Microsoft made a change to their runtime libraries that broke backward compatibility. That was a rather stunning discovery, and to resolve it the choice was either to force everyone to upgrade their Microsoft Runtime libraries to the latest release or to implement a workaround as proposed by one of the Microsoft engineers. We opted for the latter, as we want the software to "just work." If you are curious about the details, you can find a post about it here: https://developercommunity.visualstudio.com/t/Access-violation-in-_Thrd_yiel...
Anyway, that change was implemented in release the GUI version numbers 4.0.6, so if anyone was experiencing a crashing issue, that should now be resolved.
Cheers! Paul