Bentley Staad Pro Connect 2020 download required

does anyone know where I can download Bentley Staad Pro Connect 2020 update 3?

I have Bentley Staad Pro Connect 2020 update 4 which is causing serious problems on every machine I upgrade.

I need to go back a version urgently as I cannot afford the time this is taking to resolve.

I am currently waiting for the development team (or anyone) to respond with help with the continuing  install error of 0x80070643.

any help appreciated.