Applies to: ZWCAD Classic, ZWCAD 2015, 2014, 2012
Open license manager dialog box, "Activate" option is disabled, only "repair" available, so we cannot activate ZWCAD normally.
To fix this problem, we need to remove the old license information.
Close license manager, locate to "C:\ProgramData\FLEXnet" (you may need to show hidden files and folders), remove all "zwflex..." files.
try to open license manager again, now you can continue to activate ZWCAD, done.