QSSTV is a source distribution, so you have to compile and install  it.
How you must do that is clearly explained in the online documentation. Consult this documentation first.
Read the installation instructions carefully and if you have any problems, just send me an email.
The latest version of QSSTV 7.1 can be downloaded here.
I also made some sample templates you can dowload and put in your template directory. Adapt, where necessary, these samples for your own use.

Remember: SSTV has a 100% duty-cycle, so run at reduced power with the ALC at its minimum

You can send all suggestions, remarks and bug-reports to on4qz@telenet.be
Enjoy ..
 73's Johan ON4QZ