Hi Jason,
The .UNV file is a specific universe and you might have multiple universes. If you export to BIAR file, it exports all the universes, reports, folders etc. You may refer below tech document for the steps to export BIAR file in 3.3 version:
http://www.ca.com/us/support/ca-support-online/product-content/knowledgebase-articles/tec578370.aspx
In the destination screen, change it to BIAR file and continue with the remaining steps.
Thanks,
Naveen