infinder, you can temporarily replace your wings_pref.beam with this one, so you can help us to debug this version.
It can be found in a place like: C:\Program Files\wings3d_2.1.3\lib\wings-2.1.3\ebin
It can be found in a place like: C:\Program Files\wings3d_2.1.3\lib\wings-2.1.3\ebin