You can identify which versions and hotfixes are installed in your TIBCO installation by looking in the _InstallInfo directory in the TIBCO installation directory. There will be a number of files of the form:
<product>_<version.hotfix>_prodInfo.xml
where:
product: the product installed i.e "bc", "bcedi", etc.
version: the product version i.e. "6.2.0", "6.6.0", etc.
hotfix: the hotfix number i.e. "005" means HotFix 5 .