Absolutely right. Having woken it up it appears to be working as before in Cascade as well as Tile fpormat. Bizarre. Many thanks David Parker

Clicking on the name of an old or newly created rule set suddenly fails to open the box. Does anyone have any suggestions as to how to restore this function ?

[quote user="David Parker"]

Clicking on the name of an old or newly created rule set suddenly fails to open the box. Does anyone have any suggestions as to how to restore this function ?

[/quote]

I think the window opens outside the screen? Click to open the rule set window, Use Window -> tile, and see if it comes back.