We have pre-released H-Ext 0.5.1.2! Major bugs found by our beta testers plus couple user reports as well are resolved. A few major bugs are caused by first time setup which has been resolved for our new users or new setup. Unfortunately, the H-Ext 0.5.0.x plugins are not compatiable with H-Ext 0.5.1.2 and higher. However, we do have updated the plugins to work with H-Ext 0.5.1.2 and released Server Command Add-on (including source code)!
Thank you for helping us to squash some missed major bugs.