Hi Zurga
Thanks for your quick response. I use a Desktop 64 bit system with 8 GB of Ram and Intel Core i5 processor with Windows 10 and Java versio 8 Update 311.
Well; I get the Open Genealogy open interface, and I see the list of apparently saved.ged files (22 of them) in the folder that I had chosen to save them in, but after I click one, nothing happens. When I click the button Show file-details button on the top-right of the interface - the files only seem to hold 3 to 7kB of data, and the most recent ones hold no data at all (0 kB).
Only yesterday evening I was able to open files, and they were even listed right on opening the program under "Last opened" - which now only shows the Bourbon genealogy.
I see that an update was performed today ("GEDCOM compliance") - could this have anything to do with my drastic problem?