I rather foolishly clicked to upgrade from Mojave to Catalina without reading all the stuff i should have read , now my copies of Photoshop , Adobe Bridge , Word and a few others don't work , no problem thought i i will uninstall it and reinstall Mojave... slight problem my back up external drive won't open !!! i can of course delete Catalina and reinstall Mojave without a back up copy but that won't reinstall my Adobe apps .. so i pose this question , if i have a back up copy of Catalina which contains my Adobe apps (i do have it and yes the apps are there ) is it possible to wipe the hard drive reinstall Mojave then down load just the Adobe apps from the back up copy of Catalina ? if so how difficult would it be if its at all possible, just found out now none of my Canon photo editing stuff works either !!!m HELP !!!!!