MabiPro: The Authentic Old-School Mabinogi Experience

Hello there. Found out about this server and decided to give it a try. Works great and was on for about 5 hours last night. However, I tried to login to the NA client via steam today, I got an error message saying the game was already running. I thought it might have been an issue with the NA game, so I restarted steam and tried again. Same message. Also tried restarting my computer with the same result. Ultimately, I had to delete all of Mabipro's files and uninstall/reinstall Mabi through steam to get the NA client working again.Anyone else have this problem?