Did ya pick up the way to do it in the thread? Also apparently it was there as a key binding in the list, but disappeared.
What puzzles me is that you be able to select screensets in the interface by clicking numbers, but I can't find them.
To select a screenset
Do
one of the following:

Select a screenset from the Screenset menu in the Control Bar. (got that)

Click one of the Screenset buttons (1-10) in the Control Bar. (????)

Press number keys 1-0 on the computer keyboard. These keys correspond to the 10 available screensets. (now turned off)

On the Views menu, point to Screensets and select the desired screenset. (yup)...except it is in a sub-menu)