It is available in versions specific for Windows 3.1 and Windows 95.
You can obtain it from the Geoworks Web page:
http://www.geoworks.com/omnigo/download
..or directly from the Geoworks FTP server:
ftp://ftp.geoworks.com/pub/content/instal31.exe
ftp://ftp.geoworks.com/pub/content/instal95.exe
The Shipper program (unchanged) is available as a separate program:
ftp://ftp.geoworks.com/pub/content/shipper.exe
-Jim Kirkpatrick
Webmaster, Geoworks