locked Change Callsign

Doug Netherton VE3MCF

Sorry for the bandwidth, but how do you change the active callsign for JT-Alert?
I've uninstalled JT-Alert and deleted all associated files I could find, but after I reinstall 1.5.9, it still comes up as VX3MCF (A special prefix I used for December 2011).

I'm sure there is a probably something simple I've missed.
Thanks for help in advance.

Doug, VE3MCF

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