Nat said: In the previous version(s) of VP you could right click the text image on the timeline OR the text image in the clip bin to re-open the editor. It seems these options are not now working in the latest version of VP. (8.45)
In the v8.45 incarnation here, a double-click on the timeline clip brings up the editor. (There can be UI differences, even with the same release #.)
A right-click lists the EDIT TEXT choice. After the source is selected in the bin, a right-click in the preview windows does the same.