A new version of gPodder 4 is out for Android, CLI and Sailfish OS. The Blackberry version didn't make it for this release (yet), due to some Qt 5 layout issues on Blackberry 10 that I haven't yet looked into.
Among the usual UI improvements, this release changes the previously JSON-based database for a SQLite3-based database on top of minidb. Migration from the old database to the new database is automatic the first time you use the new version. As always with changes like this, it could be that the migration doesn't work for some reason - in this case, let us know in the issues tracker.
Packages for Sailfish OS are available on the downloads page and the package for Android has been uploaded to Google Play.