This isn't a major thing but I just wanted to post it in case someone else encounters it. I always back up my SQL files to a USB drive and it always has worked for me in the past to run the SQL file right from the USB drive. I upgraded to the latest version, and the file size passed 1.5GB at the same time and now it locks up HeidiSQL when I try to run the file directly off the USB drive. I let it sit there for an hour and it only created the first small table (~60kb) from the backup, so it's not just appearing like it's locked up. It also brings up the "Program not responding, debug/close" dialog when focus is brought back to it.
When I copy it to a fast hard drive and run it, it works fine. I'm not sure if upgrading to the latest version or the jump in file size caused this, but at least it still works from the internal HD.