likaroli, thanks for sending your file. I fixed the problem in your file and sent you the correct file.
The issue was different from choe's one, and it came from a DAE file you imported with accentuated letters.
I didn't find how to reproduce the bug but found a way to avoid it in Sweet Home 3D.
Until next version is released, please remove accentuated letters from 3D models files before importing them.