SlyEdit_Misc.js error when loading SlyEdit (DCT)

SlyEdit won't load, crashes with: !JavaScript SlyEdit_Misc.js line 2255: TypeError: behaviorSettings.enableTextReplacements.toUpperCase is not a function

From the sbbs logfile

Dec  2 00:16:28 bbs sbbs: term Node 1 <DaiTengu> append key into keybuf: 0D (\r)
Dec  2 00:16:29 bbs sbbs: term Node 1 <DaiTengu> append key into keybuf: 0D (\r)
Dec  2 00:16:29 bbs sbbs: term Node 1 <DaiTengu> Executing external: ?slyedit /sbbs/node1/MSGTMP DCT
Dec  2 00:16:29 bbs sbbs: term Node 1 <DaiTengu> !JavaScript  /sbbs/exec/SlyEdit_Misc.js line 2255: TypeError: behaviorSettings.enableTextReplacements.toUpperCase is not a function
Dec  2 00:16:30 bbs sbbs: term Node 1 <DaiTengu> '?slyedit /sbbs/node1/MSGTMP DCT' returned 0

This is after a fresh git pull.

@nightfox