NCH software just loves that "install on demand" routine.
I use one of their packages (ExpressScribe) and got suckered into that crap. I installed one program and now have near on 20 entries in my menu, all but one install on demand.
Revo may have been the problem. Did you just try to uninstall with the native interface?
Do you fancy trying a reinstall and looking more closely at what it offers to do for you?
The target for this one is:
"C:\Program Files (x86)\NCH Software\Scribe\scribe.exe" -extfind ExpressZip
I suggest talking to them and making your view clear on their tactics.
Fortunately, while I have that link in my menu, I do not see it in DOpus.
Directory Opus Pro 11.5.4 (Beta) Build 5326 x64
In Windows Vista, 7 Home Premium SP1 and 8.1 Update