Newest productional build and newest experimental build both have this behavior. TD crashes without recovery .toe when trying to save and before saving, add a new folder in the save-window in explorer-context, to save the .toe file in for the first time.
Sorry you’re having problems. I haven’t been able to reproduce the problem yet, but there might be a way for you to produce a dump file still that would give us some more information.
There is information on this page about using the Windows tool windbg to launch TouchDesigner which should catch errors that would normally cause Touch to close immediately. Using WinDbg to Debug Crashes - Derivative