I noticed this bug a long time ago but it's still present. This is almost a fresh install of windows 10 and I'm fairly sure it used to do it with Windows 8. Basically, whenever you have the save as window open and try to delete a file/folder, the entire IDE hangs.

Although it hangs, it does actually delete the file/folder though. When I say hang, the entire IDE becomes un-responsive and must be forcefully closed. It's a small bug but annoying if I forget and it happens.

Other info:
Operating System: Windows 10 (64 bit)
IDE Version: 1.6.10
Completely repeatable, happens 100% of the time