How mine was FIXED: I bought Dreamweaver CS6 on eBay and had all the problems as above. I talked to an expert in the chat and he verified my serial number and my registration through the seller at eBay, then walked me through installing Creative Cloud, the app. Once you've installed CC the app, you can log in, but DO NOT CLICK on ANYTHING. Quit out of all apps and restart your computer. In my case we are setting up an older iMac with High Sierra for Dreamweaver specifically in order to recover a dreamweaver-built site. After restarting, I was able to launch my Dreamweaver which was in 'verify later mode'. Dreamweaver asked for my Adobe email and password and the installation was complete. Now working!