Do they work in the IDE for you ? For me the treeview has empty titles. Also I see sometimes paths with backslashes in them in lhelp.
Example. In the IDE, I set the cursor to "procedure" and pressed F1.
lhelp is displayed, on the left tree root element is "Reference Guide"
At status panel (at bottom) "ms-its:ref.chm::/ref\refse91.html#keyword_procedure not found!"
Many tabs (at bottom), the last one is selected with the caption "[unknown]"
If I select Index and double-click on any item, the last tab is renamed to "Reference Guide"