try installing on a different hard drive or partition... i found having another partition created it was able to pick up the two diff vers easily which is making it a lot smoother for transferring all my ORBX and REX products... currently in the stages of testing each previous aircraft packages i had.... i found sometimes with installing the packs into p3dv3 i had to cancel the installation halfway thru then install again for it to pick up the new location of the P3Dv3