[Pkg-roundcube-maintainers] Bug#659041: How to upgrade?

[Koen Vermeer]

Is there any advice on upgrading existing installations? Is the data 
transferred from SQLite to MySQL/PostgreSQL, or is this a manual 
process? In the latter case, are there any instructions available for 
moving existing data over from SQLite to MySQL/PostgreSQL?

I would very much like to update and am willing to move away from SQLite 
if that's needed, but I wouldn't like my data to be purged.

Best,
Koen