Hi Tom and Judy
You have posted in the developer's mailing list.
In the future if you need assistance please post your questions at
https://forum.openoffice.org/
> All my files in Open Office Calc, (I believe it is called) going back 5 or
> 6 years are now shown to be in Excel but do no
Probably a Windows update has changed the file associations for those
files to MS Office instead of OpenOffice. Try changing the file
associations back to OpenOffice.
http://www.thewindowsclub.com/change-default-browser-program-windows-10
is a link with pictures showing ways of changing defaul
All my files in Open Office Calc, (I believe it is called) going back 5 or
6 years are now shown to be in Excel but do not have any data in them
except underline
The system I have is (unfortunately) Windows 10