I noticed on the dev page that you released a new(er) version 7 months ago, version 2.3.2 which can be downloaded there.
Unfortunately the plugin repository is not picking up on it and is still showing the old version 2.2.13. This also means that non-one who uses your plugin has been getting an upgrade notice!
I believe this can be (and should be) fixed by changing the stable tag in the readme.txt file in SVN Trunk for the plugin.
Hope this works & keep up the good work !