Can't install Multiterm what can I do ?

Hi everyone! 

So I have SDL Trados on my computer. I had Multiterm but I had to uninstall it. Now I can't install it back on my computer. The error message is : Setup did not complete. The error is : Setup has detected a higher version of this product already installed. If you still wish to install this version, you must remove the other version first. 

BUT, the other version has already been removed. What can I do ?

Thanks !!