The encryption feature has been enabled again. It's similar to what it used to be and it has been tested on client versions ranging from 2012-08-01 to 2014-02-05. Some error messages will be displayed if necessary. If you have an issue, copy the error message (with the code, if there's one) and send me the client executable with the cps.dll file generated by GRF Editor. There shouldn't be compatibility issues anymore though!