Titler Pro 7 cannot be used as a plugin inside of VideoStudio, Pinnacle Studio or PowerDirector. Some versions of VideoStudio and Pinnacle Studio have included special versions of Titler Pro but those versions cannot be replaced with Titler Pro 7.
However, Titler Pro 7 can be used as a standalone product. This means you can create titles independently and then import them as .mov files into the timeline of your editing tool.