reinstalling logic pro 8 prblem plz advise

Hi guys

Uninstalled logic studio 8 and am reinstalling

when it comes to the things to install i have a list

logic pro
soundtrack pro
mainstage
wavewburner
compressor
logic studio content
tools
Hardware support


everything is ticked except compressor which say skip and there is no way of highlighting it to tick it



the only thing not deleted is the qmaster and the qadministrator are there are they meant to be trashed ?


any help on sorting this much appreciated.

thanl u