I am having the same problem. BRU x64 3.0.0.1 in the latest non-Insider version of Windows 10 locks up and eventually crashes every time I use the context menu to run "Bulk Rename here." However, if I install the =x32= version of BRU as a standalone app, and start it up outside the context menu, I can run it fine. However, that means MANUALLY navigating to the folder in which I want to work, which is a considerable inconvenience.
I'm suspecting that if I could somehow manage to "fool" the installer into thinking that it's running in a 32-bit environment rather than 64-bit, I could install the x32 version and have it function properly. I've noticed problems with other apps when running their x64 versions, whereas x32 versions will function properly. It seems Microsoft might have some work on their hands in order to correct some sort of problem between now and the forthcoming Spring Creator's Update due out later this month. (Again, I am NOT using a Windows Insider Preview version in this case.)
I just tried again before writing this post to start BRU from the context menu, and it's been sitting with the "busy" cursor going for about 10 minutes, hasn't "crashed" yet but it might as well have -- it's just sitting there, and eventually I will have to either wait for it to barf or manually kill the process in Task Manager.
If you know of a way to fake-out the installer and let me install the x32 version, even if it's just done as a temporary fix, that might be helpful. Thanks.
//Steve//
PS: Interestingly enough, I =CAN= run BRU x64 from the Start Menu and it works, I just seem unable to start the app from the context menu's "Bulk Rename Here" option. Go figure... However, after I managed to start the program, and moved to my Downloads folder and the "magazines" sub-folder therein, it locked up. The x32 version, started up that same way, does still work. IS there a way to install BRU into the system, with the context menu functioning, as a 32-bit app instead of it defaulting to 64-bit? That would function fine for me for the time being.