Given that RSSOwl2 is still in development, some internal changes on how
your data is stored may be required from one milestone to another. This was
the case for the transition between M5a and M6. However, we believe your data
is important to you, so we intend to do our best to migrate it automatically.
This will be done on the first time you run the new version and once that's
done, it cannot be reverted. So, it's a good idea to backup your rssowl
data folder[1].

During our internal testing, everything has worked, but if you find any
problems, please report them at http://dev.rssowl.org.

[1] Default on windows:
    Default on linux: <home.dir>/.rssowl2