Epic Games Launcher issues - incredibly long load and crashing

I just used UE4 / the launcher earlier today with no issues. I closed everything earlier when I was done, but the launcher was still running in the background. I put my computer into sleep mode, and I just got back to find the launcher had somehow updated itself. No big deal, I didn’t figure it would be an issue since it mostly just looks like a UI change.

Now, however, all of my projects crash before they’re even finished loading (they reach around 70-72%). The only project I can get to load is the ShooterGame sample project, but it takes a full 5+ minutes to load with my CPU (i5-4690K) at 100% usage. I’ve never seen my CPU usage spike that high when loading any UE4 project, nor has it ever taken more than a minute or two. The crash window I get doesn’t appear to give any crash information, it’s just a bug report screen (I have submitted the crash with a brief explanation each time it’s happened). I’d like to know if the new launcher is causing anyone else headaches, and if anyone knows a fix.

Thanks in advance!

Edit: Just to add more info, I have tried restarting the launcher, restarting the PC, and setting both the launcher and the editor to run as administrator. I am the only account on this PC, it is an administrator account, and I don’t have access issues with anything else. I checked the minidump file and it says the following:

0xC0000005
“The thread tried to read from or write to a virtual address for which it does not have the appropriate access.”

For anyone else experiencing this, I found the issue to be a bad blueprint. It worked perfectly fine last night when I created it, but closing the editor somehow corrupted it. I was able to cut the blueprint file out of my directory and the editor launched fine. I suspect I made changes and forgot to save it, which corrupted the file.

Moral of the story, don’t forget to save before you close because apparently UE4 doesn’t warn you about that!