Recently when opening up Photoshop, my Adobe CS6 Master Collection pops up saying there's some kind of offer going on the Creative Cloud. For awhile I was just able to close out of it and go about my business on Photoshop, but now it's not allowing

Recently when opening up Photoshop, my Adobe CS6 Master Collection pops up saying there's some kind of offer going on the Creative Cloud.  For awhile I was just able to close out of it and go about my business on Photoshop, but now it's not allowing me to open Photoshop unless I sign up/pay.  I'm quite confused?  I really NEED to have access to Photoshop ASAP.