Missing project options in Flex Builder

I had Flex Builder 3 installed and working properly.

I then downloaded Zend Studio 7 (Eclipse) and installed the flex 3 plugin for it. Since doing that I now have a problem with Flex Builder.

I right click on the Flex project and select "properties->build path" there are now missing options. I should be able to add project references and SWC's. These options are simply missing. I basically get a blank window instead of the options.

I have tried completely removing both Zend and Flex Builder. I re-install Flex Builder and it's still the same.

This is on a Vista Ultimate system. I have tried running the installer as Administrator.

I've been trying to find if there is a way to do a clean uninstall of Flex Builder, can't find how to anywhere.

Any ideas?

Actually the problem turned out to be nothing to do with Eclipse of the Flex plugin. It's a problem with Flex Builder on 64 Bit windows.

The soloution is weird. When you bring up the properties you have to select "Resources" then drag to resize the window to its minimum size horizontally, then click "Build Path" then drag to resize the window so that it's viewable. Hey Presto the options come back!