Hey nikas, yeah I look to have the same problem as you. Here's my comment below.
Quote: "After running test mode for the first time in the editor, if I try to run test mode again the program shuts down, sometimes taking the task mamager with it. I can only save before a Test, Once I run 1 test I have to reboot the pc."
This only started happening in the last week for me. I checked ram, fresh install, re-updated to 115. Deleted the bdo/bins *thanks redeye. And it still occurs. I did install another program in this time, so I going to see if there is any conflics by removing it. who knows...I'll let u know if it worked.