Information about upgrading a Resharper plugin to v 5.0

I like the sound of the Exceptional plugin for resharper, but it says it currently only works with v4.5. Does anyone know what is involved with upgradi开发者_如何学编程ng to 5.0 and how much things have changed, which bits will need to be looked at etc. I am quite tempted to upgrade it but would like some pointers before I start...

There's no documentation as such, but please feel free to ping me and I can try and help.