If you have Mids installed on your Windows drive in the Programs folder, try re-installing it elsewhere in case its the UHC system interferring with the loading. If your anti-virus program has real time monitoring you might want to tell it to not monitor Mids (and your games), I've had problems with that before.
If that doesn't do anything for you, the place to go it is the Titan Forums.
There's a post with Known Issues for the current build (1.942), and there's a whole thread for Known Issues in the Tech Support section of the forums. Post a question in the Known Issues thread and the developers for Mids are pretty quick to give you a hand.
"I used to make diddly squat, but I've been with the company for 16 years and have had plenty of great raises. Now I just make squat" -- Me
Pediatric brain tumors are the #1 cause of cancer related deaths in children.
You need to reinstall it. I just downloaded it and it's pretty quick for me.
I downloaded Mid's Hero & Villain Designer and it seems stuck on "Loading Enhancement Database..." but after about 10 minutes the application fires up. However, the loading pop-up remains. Odd. I'm running Windows 7 (x86). Anyone else having this issue?