Release change from 2.3.0 to 2.5.5

So finally 2.5.6 is working stable.
After the update, followinf the 2.4 to 2.5 instructions for mannual update = deleting the files as described except the org.openhab.adons.cfg, which did not exist I had

  1. Some Items not working:
    Solution: I had to remove some “ghost-” or “zombie-links” via the Rest API, which ended in “nirvana” and therefore never updated my status. All hints are descibed in topic: Some Items do not work after Release Change
    Very helpful was the “autoupdate primer” linked in that topic.

  2. Error 500 and 503 in my IOS handy
    I had to unistall my bindings and reinstall them like descibed in topic:
    Error 500 and 503 after ver2.4 upgrade