Hello Allen,
After you have selected the entity to move or rotate, click the green, most below, pictogram on the left side and follow the instructions.
Regards,
Willem
The use of this command is not intuitive. My first impression was that it was not implemented.
When the command line prompts "Command:" the user is actually expected to click on the Continue Action button (>>) and that's almost impossible to guess.
A better hint is required, maybe pressing the enter key should equal to clicking on Continue Action so the command can proceed to "Specify reference point" and then to "Specify target point".
[EDIT] Er... scratch that. I tried the same in v2.0.0beta1-29-g7530c62 and it now works as expected.
I still think is it pretty counter-intuitive (or, at least, not like anything else that I use). But if someone puts a paragraph in the manual explaining this (fairly early, I would suggest) it is quite workable.