Try turning debug mode off. That can cause AxCrypt to behave unusually as it’s not designed to be used by users.
You can also try loading the standalone version from the link below.
Make sure you close AxCrypt from the Windows tray and then delete AxCrypt from your system. Now open the standalone application, drag your files into the window and it should work.
This seems to be a problem unique to you so it sounds like there’s something wrong on your computer.