Yes, Ken, I understand programming text box controls, so I am also puzzled. It is only the RA hint, the Dec hint doesn’t crash. I also tried it on my other machine running Windows 10 and this doesn’t happen.
I also tried the Target Settings Plate Solving Interface. SGP crashes when editing a character into the RA Hint box, but not when editing other text boxes in this form. I get the same crash when the solver is Astrometry.net. This on my Win7 machine.
The specifics. Click into the RA Hint box - OK. Backspace to erase a character - OK. Type any single digit into the box - Crash. The crash brings up the Windows dialog, Sequence Generator has stopped working, Debug or Close Program. There is nothing in the log file.
I just ran a new virus scan on the computer (AVG free version) although I have never had a virus problem on this machine that I am aware of.
I do have Visual Studio installed so I could click on Debug, if you think it would be helpful.