That happens to me when using it from the sd card, too. In fact, an older computer I had made it work much faster than a newer one, at least when using it from the sd card. But it's really weird that running it from the desktop is so slow. Maybe your windows or your antivirus is checking the files accesed until it determines the program is safe or something, dunno.
It's good to see people backing me up by helping others with the questions about the tools, thank you Embarrass
Well, let's see. I've been working a little on the cBliss tool. I've (hopefully) fixed the issues mentioned here, which were the size of the expandable box for characters with large names, and the issue when trying to add team colors in slots from 10 on. I've also fixed a few small thingies, but I've not included the alternate costume slot option yet.
You can get the updated version from the vault:
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=33347
I'm working on the alternate costume thing, when it's done I'll update again. If I missed any reported issue, or you find any issue with the tool, just tell me about it and I'll include any needed fixes.