I really didn't know that Resolve does not have the ability to separate the video from the audio. That would certainly be a deal breaker for me and reason enough to stay with my Premiere. In the majority of my videos, the audio is unwanted noise (wind, crying kids, etc). I can just drag the video into the time line and add my own sound effects, easily obtained from You Tube and many other places.As my mac crashed, I had no problem setting the systemup on a new one, using the last backup. Within a few hours I had a new book and it was on the software-level I had before the crash. No need for new software.
Did you use the "migrationassisten" Apple has standard installed?
As you all must know, Adobe Premiere, like all Adobe products, are portable. Thus, you can activate it from any computer in the world. You have two activations. If you travel to another place without your computer, you can upload the programs (Photoshop, Lightroom, Premiere, etc) from the remote computer. You of course have to de-activate one of the other programs, such as the one on the computer you left at home.