1.) In Windows / Control Panel/ Add remove programs
The entry for Tixati is missing the version number

2.) at the same place, right clicking the Tixati entry give one menu option "Uninstall/Change".
When clicked it goes to uninstalling straight away, with no option for "Change" (o any other option).

I have , well had, version ... I don't know, due to above reasons. ;)
It was probably 2.55, on Windows 8.1