I am using Zoiper Classic free edition on Windows 8 occasionally it will delete the IAX information and it has to be re-entered. The cause is sporadic, sometimes I get a Zoiper has quit working message and once it restarts the information is gone, other times it is gone on reboot even still at other times I will leave my computer come back and the information will be gone (though I think this may be related to the Zoiper stops working message and its automatically restarting with the missing information.) I have several machines with Zoiper but it only seems to happen on the Windows 8 machines. Any help would be greatly appreciated.