We don't have an official schedule but expect the next release sometime in the next few months. In terms of compatability, Power Tools may not always work with all currently supported releases but we strive to as a goal.
1/ the user management by command line with QV11 is very important for simplify administration and be able to update the security dayly as a result of other works, it can be a bad point to migrate from V10 to V11
2/ to list the object and filter them with the Server Object Handler, not only delete them ..
We ran into above errors as well while trying to use the "QlikView user management" command-line tool (part of PowerTools) with QlikView 11. Since we need it we downloaded the source code from github and tried to make the modications necessary for it to work. We succeeded by applying following steps,
1/ open project in Visual Studio 10 Express
2/ refresh QMSBackendService using the address of our QlikView 11 server (localhost:4799/QMS/Service)
3/ change all QMSBackendClient to QMSClient
3/ change all Exception to System.Exception
4/ comment out a non-critical (?) piece of code that references Metadata.Preload which was removed from the API
5/ re-add ServiceEndpointBehavior pieces to config file