I cannot reinstall my Acrobat 9 Pro on my iMac (27" late 2012) running Yosemite.

After replacing the hard disc on my iMac (27" late 2012) I have tried to reinstall my Adobe Acrobat 9 Pro. No success with either copying the program from my backup disc nor with reinstalling it from my original DVD nor with downloading the copy on Adobe's website. In all cases I get an apparent installation but with a menu reduced to a single item ("Acrobat") and no activity following this. I have tried using the contextual menu's Open command which generally fails once let me get up to being able to write my activation code, which seemed to give me a full operating copy. However a further attempt to use it brought me back to the 1-item menu and non-operability. What can be done?

Jim Ritter