Opening an 4.2 project in 4.3 has caused loads of Load Errors, for everything, whenever you do anything at all. Then it creates loads of temp files. It also has retro-actively bugged the project so that I get the same error in the old version! error|470x500
Try moving the project folder to another location and try again, if you can’t move a file you should check what program is using it (try restarting once)
I remember writing this reply as soon as I figured it out, but now I clicked here and see that it didn’t post. I wanted to say that I found out what the issue was, it was a mistake on my part, I had accidentally set the folder as read-only.