Kaitlyn, I also encountered this problem. I would just try again to open the mIRC. Sometimes, it would work where the "Exit" becomes "Continue" again and I get to log in to IRC again BUT most of the time, I would wait for one day to a few days (this happens more) before I can log in again. These days though, I would not exit the mIRC program but just disconnect from the channels. This way, I just click the Connect button and I am logged in again. However, this would require you to not shut down your laptop/computer. I still have not found a better solution but this works for me, for now. Hopefully, we get to find in this thread a better solution for this problem.