What operating system and/or browser are you using?

I am using windows 8 and 7 on different rigs and firefox on both.

What were you trying to do when the problem occurred?

On logging in, Byond immediately crashes on two of my computers.

What actually happened, and how did it differ from what you expected?

Byond immediately stops responding as soon as I log in.

What steps did you follow?

I have tried restarting the computers, I have reinstalled Byond. I have gone back and tried several versions. Each one still crashes on two separate rigs.