Hi,

Just downloaded the latest binaries for Mercury Particle Engine 3.1 for XNA 4.0 and the editor doesn't appear to be working properly.  Right-clicking on an emitter to add modifier doesn't bring up a sub menu, so you can't add a modifier.  Also, the samples that you used to have in the bottom left pane aren't there anymore.

Windows 7 btw.

Cheers

Right-click the downloaded zip archive and open the Windows property dialog.

There push the "unblock" button to mark the downloaded content as safe.

Works on my machine :)