I can't be real helpful because I'm no expert here. I just use HomeSite+ as a tool for editing asp-like pages in Crystal Enterprise. But there do seem to be several options in the Options/Settings dialogs. Do a Help/Search on "tag insight" for some topics that discuss a Tag Definition File that may be corrupted or missing, or maybe you need to add it to get the CF tags.
Options/Settings/Editor:Tag Insight is the dialog where the individual tag definitions appear. Options/Settings/Validation and Options/Settings/Tag Definitions Library may also be related to which tags appear in the list.
Beyond that, I don't know what to suggest. Unfortunately, this is a very low-traffic forum, as the thread dates will attest.