DT Benchmark not launching

[Limecat]

edit: Ah, looks like someone else already found out a solution. That didn't work for me unfortunately, so whatever is going on with my computer remains a mystery. I'll leave this here though, just in case.

1. First, you'll want to download the 4.5 installer off Microsoft's website. There's an offline and online version, the offline might be more convenient if you find yourself in a position to experiment with swapping.
2.Then as a precaution, look in your installed programs list and find out what version you're currently using. Get the installer for that too, since obviously if you use any other software using later versions putting 4.5 on is going to make them all stop working.
2a. Make a system restore point of your own for extra paranoia mitigation.
3. Go into Add or Remove Programs, uninstall whatever version of .net you have going. It'll probably take a while.
4. Install 4.5. It will also take a while. No restarts were needed during any of this.
5. Try to run the benchmark. If the launcher GUI starts up now and you can change the settings/etc, yay.
5a. If it doesn't and that wasn't your problem, either system restore back to your old .net, or use the later version installer to upgrade your .net back to where it's supposed to be. You can run that one without uninstalling 4.5 since it's an upgrade. The only reason for the previous uninstall is that .net installers will stop and tell you no if you try to run an earlier one while a more recent version is on your system.

X. If you don't have any version of .net framework installed, well, that would explain your problem.

???. Later versions of .net are supposed to be wholly compatible with applications built for earlier versions, so I have no idea why it's behaving this way.