The concept of locking the configuration to allow editing is counter-intuitive to most users. However, if you understand where the lock originated, it may make more sense. You see, when ResSim was first designed and built, it was part of a multi-user, client/server system. In order to function properly in that multi-user environment, the ability to lock out other users so that only you could edit the watershed was an important feature. Now that the multi-user framework is no longer being actively used, the lock has become redundant. It will be removed in a future version of ResSim.