When changing "Program Settings" -> "Startup Screen Mode" to a value other than "Current" SyncTERM will hang and then crash the next time you open the program.
Steps to recreate:
The program should show a blank / black screen, then after a few seconds an error message will be displayed. Please see screen capture for error message. Windows 10 1809, latest SyncTERM download from Sourceforge.
Anonymous
It works for me on 80x43, what mode are you trying?
Possibly fixed in CVS.