I just tried out Resolve 16 beta.
OK I know I should back everything up before trying out betas, but in the past Resolve has been very well behaved.
This time, not so well behaved.
It did ask if I wanted to upgrade my database, but didn't offer to back it up. The new format is incompatible with older versions.
Unfortunately 16 won't run very well on my Windows 7 machine (i7 3.9ghz, 32gb, GTX470 and all SSDs), so I uninstalled and now have lost access to previous projects.
Not a major disaster, just rather annoying.
Don't be complacent, it's a beta.