Dev build is fine to use, no real internal changes have been made since the release earlier besides this extra sort setting -- no risk of data corruption. It's stable.
I post new releases when the program feels "stable" enough, but I don't want to spam people with update notifications in posting new releases constantly.
I don't expect the next "stable" release until September or October, as there really isn't enough being added at this time. Besides bug fixes and small additions, there might be trashbyte legality checks in the future which will take time to fully iron out before being pushed to as a release.