Oh wow. It's definitely not using up 32 gigs of RAM. MatterControl is a 32 bit app, so it must be running up against the 4 gig limit. Nevertheless, it's working for us when we slice the same file. Maybe something about the settings you're using is causing excessive memory usage.
Some people eh? Put out a few successful prints and they think they've got the hang of it... ;)
I had assumed it was temperature related because a print that worked well before came out really badly in the new colour and that was the only thing that had changed (at least AFAIK). The results were the kind of mess that I'd (wrongly?) learned to associate with running too hot.
Clearly there is more to this 3D printing lark than it appears: I reckon it will be a fair while before they get as popular as 2d printers...
Uninstalling MatterControl does not uninstall the driver. To remove the driver manually, go to C:\Windows\System32\DriverStore\FileRepository and delete the mhserial.inf_... folder.
The mhserial "driver" really doesn't do much. The actual driver is built into Windows. Mhserial just tells Windows to use the driver it already has to communicate with certain devices. It sounds to me like your printer has some kind of hardware error.