I need version 2.65 for my private tracker since they don't allow any other version. It was hard enough to get them to approve this client, so I'll take what I can get. Where can I find the older versions?

Here are links to v2.65:

Windows 64bit
https://download1.tixati.com/download/tixati-2.65-1.win64-install.exe

Linux 64bit
https://download2.tixati.com/download/tixati-2.65-1.x86_64.rpm

Ubuntu 64bit
https://download2.tixati.com/download/tixati_2.65-1_amd64.deb

Standalone/Manual Binary Install 64bit
https://download2.tixati.com/download/tixati-2.65-1.x86_64.manualinstall.tar.gz

Portable
https://download2.tixati.com/download/tixati-2.65-1.portable.zip

Thank you!

Needed here as well, for the same reason.
Links above are dead.

Join a few Tixati channels and use built-in search. In any case make sure to verify your downloads with "gpg --verify" or find a trusted place that published the hash checksums for the original files.

Literally spoof your user agent, otherwise Tixati is unusable on private trackers.

I just started using this software, get much faster speeds with this software.

Just wondering why you want to use older versions. Newer versions should be better than the previous version you would think?