That's funny, I've got a version of ghost recon that installs as v1.0.0.2 and you can just see the version number in the right bottom corner of the main menu. So how come you don't know ? Can't you start Ghost Recon ? Or maybe you've got a v1.0 version without a version number displayed in the main menu screen.
Anyway, if you can get to the main menu and you don't see a version number, assume you've got a v1.0. If you can't start it, there's a big chance you've got either a v1.0 or v1.0.0.2. Just try cracks for both. If you need cracks for other versions, see
here .
You could also just download the latest official patch and the crack for it.