I want to print an envelop. This used to be easy. Now it seems impossible

There is no versions number. In the older versions there was a version number.

The older version was intuitive. The new one is not.

The help says, “To accesss this command …
Choose Insert - Envelope”

How does one choose “Insert - Envelope”? The help is silent on that important matter.

There is no versions number.

What do you mean? Help → “About …” pops up a window showing the version, just like every GUI program.

How does one choose “Insert - Envelope”?

In the menu bar at the top of the window, click on the word “Insert”. A drop-down list of menu items appears. Scan down, and approximately 2/3 the way down is an item named “Envelope”.