If you exit PowerWorship while the program is in a minimized position (e.g. by right clicking the PowerWorship item on the Windows taskbar and selecting Close) the next time you go to launch the program, the main program window will be hidden (minimized, really).
This is because PowerWorship remembers its size and position from the last time it was run, and the settings are used when launching the program. This is not so helpful when the window was minimized at the time when you closed the Window, as it forces you to maximize the Window (e.g. by right-clicking the taskbar and selecting Maximize) in order to use the program again.
To avoid this problem (until it can be fixed) don't close the program when the main window is in the minimized state.
Once you've already closed the program from the minimized state, you can restore it to the default (normal) configuration by deleting the following key in the Windows registry:
[HKEY_CURRENT_USER\Software\VB and VBA Program Settings\PowerWorship 3.0\frmMain]
See the following article (if needed) for help on editing the Windows registry: http://pcsupport.about.com/od/windowsxp ... gkeyxp.htm