If you see a warning message such as "WARNING: System stack components are out-of-date and not supported with this version", it means the TimeTrex requirements for PHP and PostgreSQL are out-of-date and need to be upgraded to continue using TimeTrex.
If you installed TimeTrex using the automated installer on Windows, simply download the Windows automated installer again and install it over top of your existing TimeTrex directory. The installer will detect an existing version of TimeTrex and prompt you to perform an upgrade to retain all your data.
If you installed TimeTrex on any other operating system, or manually, you will need to upgrade the stack components as per the normal procedures for your operating system.