17 does not render

Hi. Since yesterday DaVinci 17.2.1 can't render even a simple timeline with 3 compositions I made in Fusion. Sometimes stops around 60% or doesn't initiate it. I thought could be an busy Hd but it's not.
Any idea what can cause it?
Neded to say that my computer has the minimun required for 17. Used to run ok with other versions.
Where I can download to downgrade for other 17 version?
BR
Any idea what can cause it?
Neded to say that my computer has the minimun required for 17. Used to run ok with other versions.
Where I can download to downgrade for other 17 version?
BR