yes there is a way. First get xampp and setup your own update server. put the ips in as your external ip or 127.0.0.1 (localhost). put any number in history but cant be same as what ever their client got. then copy that history file from your update server to your client, also set up the config file in the client (also on update server side) to connect to your update server. Then run the launcher, if you are connected to your update server then you can run without problems. If your having problems then you missed something . Make sure apache is running.
Cheers
PS: If you unpacked it then use other server's dekaron.exe, but i suggest you try my way on "packed" client.