problems with installing Supreme Commander 2

hi everyone.

I have a big headache of Supreme Commander 2
i want to install Supreme commander 2 on my computer and it's keeps muttering about that I already installed Supreme Commander 2.
It's true mostly, I had Supreme Commander 2 installed and I trow it off again.
Now it won't reinstall because I most delete the first one who already is deleted!!
I try to find left overs on my pc, save games, program files, even regEdit but totally nothing!
I even Unistalled Supreme commander 1 and extension to be sure that also is out of the qeustion.
The error its says is; there is already a other version of the product installed.
You cannot continu installing this version. Use programs in configuration screen to uninstall the existing version.
What must i do to get the game installed??

 

problem solved
apparently my steam was not good and had to be reinstalled after that it's worked sweet.
greetz martien

 

Glad you got everything worked out. Have fun playing

 

I surely do that
play the first campaign already out:-D