Thanks for that. So I deleted workspace.kds and copied the projects from my backup into a directory in ~/Documents called KDS_Backups.
I also downloaded the latest KDS frm the web site.
Then I executed your steps as above, with no prior workspace.kds (I even changed the workspace from within KDS to point to the directory where I had no workspace.kds since I deleted it before) and I got this:
"Some projects cannot be imported because they already exist in the workspace"
I don't understand how kds can say the projects are there since I already deleted the directory that it is going to use!
Any help greatly appreciated!
Nigel
btw, this is only a problem in linux, I did exactly the same thing on my brand-new windows 10 laptop at the college and it worked exactly as advertised! At home I am all linux though. Have been using kds for a year at home and never ha dthis problem before.