I took a look at it and find out there are two extensions contain tc-wbarconf
wbar.tcz and Xprogs.tcz
The wbar.tcz one is compiled against fltk-1.1 when the Xprogs.tcz one goes with fltk-1.3
If one load wbar.tcz before Xprogs.tcz, it'll be unusable
Please update the wbar one
BTW, on both x86 and x64 platform
tc-wbarconf only present in wbar.tcz