After upgrading to ver. 6.6 my radial filter stopped working. All the other filters seem to work. After using the keyboard short cut or clicking on the icon I do get the plus sign on the screen, but won't respond. when I go to edit, it shows the "undo radial filter", which tells me its engaged but won't work for some reason.Being new to LR I tried the other filters to make sure it was an isolated issue.
Did you uncheck the option for "Use graphics processor" from the performance tab in preferences.
If the above does not work, try resetting the preferences of Lightroom once.
Yes that was already unchecked...I did do a "restart" on the general tab in pref....if that is what you meant in "reset". That seemed to do the trick though.If their is another way of resetting prefs. do let me know, and thanx for your speedy response.