Unable to start SCO in Steam any more.

Hi Guys

I now appear to have done something wrong with SCO.  I had no issues with SCO - Fleet Battles BETA, but since then after installing SCO on Steam and last playing 27/04/2018, then recently returning to it following a break from gaming (Personal Issues) I am unable to start the game.  I click on Play in Steam and I get a Steam - Error pop-up stating

"An error occurred while updating Star Control: Origins (missing executable): K:\SteamLibrary\steamapps\common\Star Control - Origins\Game\StarControl_DX11.exe"

I have done several of the steam support recommendations and verified game files etc. but I still have issues.  I uninstalled SCO Fleet Battles BETA and SCO in case that was an issue and I reinstalled SCO.  Still the same issue.

Anyone got any ideas?  I am up to date with Steam, Windows 10 and Graphics/Audio drivers.

Cheers

Andy