On the surface it appears you have a download accellerator that's eating up and also possibly corrupting your downloads. If so, this must be disabled before attempting any further downloads. To get your download link renewed email MTU and explain the situation. Here's the email address.
dougd@mtu.com
This being after businness hours, and going into the weekend, you may not get any response until at least Monday, Thought you should know that.
Don't know why you can't uninstall, but try shutting the pc off for a few minutes. If it still won't uninstall, you may have to go into the Microstudio folder and manually delete Microstudio, then reboot.
Take care,
George