It seems that the most serious issue could be bypassed by removing the .wbte association with the program, which is creating that horrible recursive loop of doom.
For the .wav file issue I would really like to see if there is any error output in the logfile after trying to export to .wav. Clicking on File -> Show log file should open the log file in a text editor.
Seems like this is a high-end PC which should not have any problems with RAM use, unless you are running the 32 bit version of the editor, so I am guessing that there is a problem with the program's use of the NAudio lib (which is used for the wav-file export) or some export option that is causing this.