Crash with Beta 6/5/4/3/...

Hi,
Resolve crashed randomly while editing videos, so I decided to buy a new graphic card because my card was really outdated. I bought a Gygabyte GTX 1080, also I bought a decklink mini monitor 4K to be able to monitor my color grading on my HDR TV.
At the same time the new beta of Resolve was released, so I updated it.
Now the software doesn't crash randomly, but some projects crash at opening and others not.
The main problem is that even in a new project created with the actual version, when I try to add a video to the timeline the software crashes everytime.
I tried with old beta versions of Resolve, I tried to disable the monitoring, and other manipulations, but for now unfortunatly I can't use the software… :/
Thank you for your help.
Mickael
Resolve crashed randomly while editing videos, so I decided to buy a new graphic card because my card was really outdated. I bought a Gygabyte GTX 1080, also I bought a decklink mini monitor 4K to be able to monitor my color grading on my HDR TV.
At the same time the new beta of Resolve was released, so I updated it.
Now the software doesn't crash randomly, but some projects crash at opening and others not.
The main problem is that even in a new project created with the actual version, when I try to add a video to the timeline the software crashes everytime.
I tried with old beta versions of Resolve, I tried to disable the monitoring, and other manipulations, but for now unfortunatly I can't use the software… :/
Thank you for your help.
Mickael