I have just updated from the previous version to v1.3.2628 and re-started the Client. The Client was stopped and re-started during the upgrade so nothing seemed amiss. Now, I can click on any of my stored computers and their various options appear but if I click on any, say Remote Control, nothing happens.
Turns out I have the answer already, though not the cause. It is actually necessary to close and re-open the Client again. Then, it works!
I have not seen this behaviour previously, despite being a Pro user for several years.
Thanks for any coments.
David