A new version of VStar has just been released, and along with it, a plugin that will allow you to upload data to plot in the AAVSO Extended File Format. Which means... you can now view your data as output by VPHOT.
To download VStar or read more about it, please visit this page: http://www.aavso.org/vstar-overview
To read more about the VStar plugin mentioned above or download it or one of the other ones for your own use, see this page: http://www.aavso.org/vstar-plugin-library
Both pages contain more explanation and information that could be useful to you whether you are new to VStar or an experienced user.
If you decide to get more involved or have ideas for new VStar plugins that would be helpful to you, feel free to visit the VStar Team pages, join the team, or just post your comments there.