App wont uninstall properly

Hi all
I installed an old game (FIFA Manager 06 from CD) to my laptop (windows 10) but it wouldn't work.
After trying a couple of things I gave up and tried to install it using the built in uninstaller in Windows.
It didn't seem to do anything so I browsed to the programme files and found an uninstall.exe for it and tried that.
Again nothing appeared to happen after I gave it permission.
So, I downloaded a third party uninstaller but when i opened it, the game didn't appear in the list of apps. I tried another uninstaller with the same result and when i go into the windows list of installed apps, it no longer appears.
However if I browse to the program files, its still there - taking up 1.8gb.
Not sure what to do now, I was tempted to just delete the files as windows doesn't recognise it now?
Is there a safer way?
Many thanks.

I wouldn't worry about it. The 1.8 GB of storage it uses is tiny. And you could even delete those files yourself.

Thanks for the suggestions, I have tried Revo and even when I search for it, it cant be found.
I think I will try re-installing it later and see it finds it.

OK, I re-installed the game after downloading Fifa manager 2012 demo.
I thought I would give the game one last try and now it seems to work fine (if I launch it from the CD drive). So maybe the download included a driver or something thats required to make these old games run?
Or maybe next time I try to play the game it just wont work again!
Many thanks anyway.

Thanks, will do. Is it the right thing to do to mark it as solved?