Can Libre Office open .wb3 files?

I have a number of old Quattro Pro files with .wb3 extension. Is there an add on for Libre Office to open these files?

It does not appear possible to open WB3 files. Older versions (v3.3) can open Quattro Pro v6.0 files (WB2) and fdo#37143 is the related enhancement to add WB3 support.