Maybe it is the problem with latest file here.
User appdata. Could not copy direct, but search for freeze appdata.
Edit:
AOG freezes when You make a mistake in the COM port to connect at the beginning.
If AOG does not start, delete the following folders
C: \ Users \ AppData \ Local \ AgOpenGPS \
Make a backup first if you want to keep fields for later.
Or just find the latest file in AgOpenGPS folder (it is the one agopen try to open at next startup) and delete that one only.