[Dovecot] Reset vacation lda-dupes database

[Mike Selner @ Yahoo]

Hello, I have dovecot 2.2.6 and pignenhole 0.4.2 running on freebsd9.1. We have a mix of unix users (/home/user) and postfixadmin users (/home/vmail/domain/user).
I am using dovecot managesive with afterlogic webmail which has a managesieve plugin to set the out of office message. All works fine. I have sieve_vacation_default_period set to 1d.

The problem I'm trying to solve is that users set their vacation message and want to test it. So they have their colleagues send them multiple test messages and want to make sure it works. Of course only the first message gets an auto-reply. I tell them that the auto responder only sends one message per day per sender but they would like to test it with a new message etc. So I have to remove their .lda-dupes file manually so they can try again.

My previous autoresponder setup (squirrelmail) used a .forward technique and removed the vacation database when they turned the responder from off to on, and this worked well for the above issue.

Is there a solution for dovecot managesieve which will remove or reset the .lda-dupes file whenever a new sieve file is uploaded? Or another solution that will reset the "vacation timer" when the user turns vacation from off to on? 

Thank you
Mike