Tixati downloads and installs and then when I click 'Run Tixati' on the installation window, it closes and doesn't run. When I search for the software, it just reopens the installation program and redownloads and has the same problem.

what OS and what version of tixati?
you did download tixati from the tixati website right?
https://www.tixati.com/download/
is this the first time you have tried to install tixati?
have you had any trouble installing anything else recently?

might this be an administrative issue?
are you logged into to the computer as a normal user or an admin? Perhaps normal users are restricted from installing and running new programs.

I've downloaded other things with success and I have an admin account but this doesn't seem to have made a difference. One website gave me the option to Open in Tixati but then never actually opened.