pg*.dll in psqlODBC have no version numbers

We download the ODBC source from http://ftp.postgresql.org and build it on-site, 13.02.0000 in this case.

A colleague noticed that the following files in the psqlODBC MSI for Windows have no version numbers:
pgenlist.dll
pgenlista.dll
pgxalib.dll

Does anyone know if that is be design or just an oversight?

Btw, the same holds for ODBC 12.02.0000.

Thanks, Mark