You may already have 9.0.1FP5 or better FP5IF1 installed. If Designer is part of your installation, chances are all your plugins in DDE got disabled. I mean the plugins you have installed to DDE, such as newer version of Extension Library or OpenNTF Domino API.
Solution seems to be simple: in Designer go to File - Application - Application management, expand the second entry and there you should see list of user installed plugins. You can select them all and then Enable them. Or simply enable only those you want to use.
I finally have some more time to write blogpost about thing that has made me very happy recently.
Thanks to all of you who have nominated me and all people involved in final decision my IBM Champion status has been extended for the next year!
Being awarded for something I love to do is very nice, right? I mean I was making contributions to the community before I was awarded. I never did it because I wanted to be awarded. But it feels good to be officially recognized, to know people are appreciating what you do.