Please find the email from support that applies to my case. I have attached the .bat files required for the downgrade.
I really appreciate receiving support of this quality who has been provided very fast.
"Hi xxx,
Try rolling back the game to the old version 2.9.9.2280. To do this, copy the attached file to the folder with the game files, and run this file once.
After rolling back, start the game and check the operation of the controllers. Then, you need to find the following files in the bin folder:
openvdb.dll, openvr_api.dll, openvr_mod.cfg and openvr_mod.log
Copy them to a separate folder, for example, on the Desktop.
Then update the game to the latest version. Now paste the copied files into the bin folder of the updated version (the two existing files will be replaced).
Sincerely yours
"
Reverting_DCS2.9.9.2280.bat