Oops... I accidently deleted a save point ...

[maddog59]

Is there any way to retrieve it? I launch KSP via Steam, if that makes a difference.

I was deleting a bunch of save points via the 'Load Save...' menu and accidently got rid of one I'd meant to hang on to. If I'd done it via the OS I could have gone into the recycle bin (I assume?), but it's not there. I should've known better than to start cleaning up my .SFS files first thing in the morning.

[VoidSquid]

Sorry not to have better news, but when it's gone, it's gone. Theoretically you could be lucky if you have a VSS snapshot containing the missing file, give it a try, sure, but that's probably a wide shot.

I can only give you some recommendations to avoid such situations in the future, namely:

Do regular backups of your KSP installations, in particular before changing anything substantial (e.g. updating a mod). Keep dated backups (e.g. "KSP 2021 January", "KSP 2021 February").

Do frequent backups of your save games folder, I make those every time before starting KSP.

[maddog59]

Since I don't know what a VSS snapshot is, I doubt I have one.  
Come to think of it I loaded something called S.A.V.E. a while ago, just never paid much attention to it ... maybe that will have something I can use. 
Fortunately this particular instance isn't a real big deal but it's a good lesson. Sometimes I think my life is meant to be a just one long cautionary tale! 

[jimmymcgoochie]

Check the backups folder inside KSP/saves/your-save-name, it holds several backup copies of the persistent.sfs save file (I think default is 5), maybe that will help?