Pro Tools 11 upgrade issue on mac

My pro tools 9 software has recently been deleted off my hard drive after my macbook pro crashed. I cannot install it back on my computer as it says that Pro Tools 9.0 no longer compatible with Mac OSX 10.8.5. I would like to upgrade to Pro Tools 11, but I think I need to re-register my Pro Tools 9.0 software before I can upgrade, and I have lost my yellow card (containing the serial number, registration info, etc.) My 2nd generation iLok still contains an active licence for Pro Tools 9.0. Is it possible to just buy the Pro Tools 11 upgrade without having to re-register my Pro Tools 9.0 software? Will the licence automatically transfer from Pro Tools 9.0 to Pro Tools 11?