synchronizing other than Evolution calendars

With the last version of multisync succeeded (after futile trials for 
the last 4 years!) to synchronize my HP-IPAQ with my workstation running 
Evolution for which my deepest thanks.
However, although I have used Evolution for at least the last 6 years 
the recent versions are so buggy and unreliable that I switched to 
Thunderbird as it now has a calendar/appointments plug-in.
I therefore want to synchronize this calendar with my IPAQ.
Which plugin do I have to use for multisync to do this?
Thanks in advance
Joep


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