Dear Schleifer,
The log file message "There is no library selected in the Star Picker" was spot on.
I've been able to reproduce the crash and I've seen that the error gets handled in the wrong way.
Solution:
The star picker is the toolbar on the left side of the StellarIP window.
Under "Libraries:" there's a list of the currently loaded libraries.
If there are no libraries loaded in the star picker, please go, at the top of the window, to menu Library -> Manage
Click the "Add" button and browse for the TCLib file and then close the library manager.
Now the library should have been loaded in the star picker.
Make sure the library in the star picker is selected by checking the checkbox next to it.
After that Generate should work.
We will fix the crash in the next release of StellarIP.
I hope I've answered your questions.
Greetings
Remco Boom
StellarIP Developer