If you are unable to log in and getting "network path not found" error, please follow the steps below to fix it.
1) Make sure the player is close.
2) Go to My Documents/Documents --> Play MPE Player
3) Look for the file named db1 and delete it
4) Log into the player again
5) If you get a prompt about transferring file from old player to new player, you can just ignore this message. This will only work if you just installed the v5 player and you have v4 player before.