Ok, Opus newbie here... a little stuck getting "copy SENDMAIL" to work with Thunderbird.
1st a little background. I'm on Win7 RC1 (x64) and latest Opus (x64). Thunderbird is set as my default mail client in Windows and in Opus preferences i have "send email via: MAPI client" set.
Mailto works.. open a new Thunderbird email...

But copy SENDMAIL gives me an error

Here is my copy SENDMAIL button

Help! i'm stuck, any guidance will be much appreciated! 