After installation Cubase Pro 10 kicks me out from my older projects!

I have a problem. I used to use Cubase Artist 9 and I have a lot of projects there, but after installation of Pro 10, I can’t open any of 'em, cause Cubase Pro 10 kicks me out. I have no idea what’s happening. I had attached “DMP” files, could someone help me, I have a client session tomorrow, but my DAW isn’t working. Help!
Cubase 64bit 2019.6.3 (631 KB)
Cubase 64bit 2019.6.3 (574 KB)
Cubase 64bit 2019.6.3 (564 KB)

Hi there

Why not just use your old Cubase Artist V9 for your session and then figure out why V10 isn’t working?

Best Regards, Dave

Hi, Dave!
Thnx for your reply, but your answer didn’t make a sense. Honestly, I deleted a previous one, cause I was super exited 'bout my PRO 10, but now I look like an idiot. XD
How could I solve this issue, any idea? Did you experienced smth like that?

Hi Glorian

I had no problems at all like you are describing. You can redownload Cubase Artist 9 it will work alongside v10 without any problems using your existing licence.

Best Regards, Dave

Cubase 10 technically should open all projects from previous versions. Atleast all other DAWs work like that

Yes, you right, but the issue was because of AutoTune 8.1, and Steinberg has no solution for that, they just blame Antares, but in the same time in previous C9th version AutoTune works properly and I do not expect any issues.