Current version not compatible with SeaMonkey 2.6.1 Rated 5 out of 5 stars

Great add-on for ThunderBird! The current version says it is compatible with Seamonkey versions 2.6 - 2.7 but I cannot get it to install as it registers as not compatible with 2.6.1 (on Mac OSX 10.5.8 - Leopard).

Is there a way to edit the xpi file to make SeaMonkey accept it?

This review is for a previous version of the add-on (0.5.6).