SlyEdit TypeError: behaviorSettings is null

It seems that if a user had saved an old SlyEdit configuration, it's expecting an existing option and failing.

nov 11 15:50:53 scarlet synchronet[3299758]: term Node 1 <Ragnarok> Executing external: ?slyedit /sbbs/nodes/node1/MSGTMP DCT
nov 11 15:50:53 scarlet synchronet[3299758]: term Node 1 <Ragnarok> !JavaScript  /sbbs/exec/SlyEdit_Misc.js line 4437: TypeError: behaviorSettings is null
nov 11 15:50:53 scarlet sbbs[3299758]: [126B blob data]
nov 11 15:50:53 scarlet synchronet[3299758]: term Node 1 <Ragnarok> '?slyedit /sbbs/nodes/node1/MSGTMP DCT' returned -1