go to:
C:\Program Files (x86)\Fox\Aliens vs. Predator 2
and change the folder name to
C:\Program Files (x86)\Fox\Aliens vs. Predator 10
then click on start menu button and type "regedit" then click regedit.exe
on this program go to this directory:
hkey_local_lachine\software\wow6432node\monolith productions\aliens vs. predator 2\1.0
double click on "installdir" and change "value data" from
C:\Program Files (x86)\Fox\Aliens vs. Predator 2
to
C:\Program Files (x86)\Fox\Aliens vs. Predator 10
so it matches your newly named game directory
restart pc