Are you using a mouse? Trackpad? Did you read the instructions and release notes? I use an Apple Mouse and I just need to click on the upper right side of the mouse! ajm
Figure out how to make right-clicking work on OSX. Once you do, it will also work in XP under Parallels.
The answer will vary depending on which Mac you are using and which mouse. The one solution that will work with any Mac is to get a two button mouse for eight bucks and push the right button. this has the advantage that modifiers plus right click, which are used in Windows will also work.