Recent content by quoring

I want the latest (newest) software not to be able to open it at all. I do not care about the old version. I did not write anything about if the older versions can still open it or not. I do not care.

I know that it is not possible. However I still need to figure that out.

Here are two examples: 1. Microsoft Excel. If you buy the newest version of Microsoft Office, it is able to open and read all files that were created with the older versions of Microsoft Office. Let's say that I have an older version of Microsoft Excel and I create some files with it. Later...