In the project bin, when I open the context menu of a title clip, the entry "Edit clip" is disabled. Same applies to the menu bar. However, I can simply double click on the clip to start editing. Reproducible: Always Kdenlive 16.04.01 (missing in the version drop down)
This has been recently fixed in the current beta 16.07.90 and should reach you at least as 16.08.0.