Important hint for migrating to version 2.2.0 or above

The following procedure is NOT required, if you have already version 2.2.0
or any version above installed!

From version 2.2.0 on, the synchronization of shared categories is supported. 
Unfortunately this leads to the paradoxical situation, that with the first 
start of the calendar all categories with enabled "Shared" flag will be deleted, 
as the shared event file does not hold any categories, yet. The easiest 
workaround is to replace the shared event file with a file of the same name 
but with no content, that means 0 bytes size. While replacing the event file, 
all instances of the calendar must be completely closed. After replacing the 
shared event file, you can start the calendar that has the shared categories 
you want to distribute to other clients. The calendar detects the 0 byte file 
and will start a fail safe routine that'll build up a new shared event file 
now including the shared categories. From then on, the calendar will behave 
as usual.

Please take also care to update all installations of UK's Kalender simultaneously 
to version 2.2.0!