Following the Trillian 3.1 patches for the changed ICQ protocol, updates for all Trillian versions are now released. These patches replace all previous patches. Trillian 3.0 uses the auto-updater. You may also start the update process via the help menu. All older versions require a manual download. Shutdown Trillian before installing a manual patch. Unzip the patch and copy the aim.dll file into your Trillian folder (and replace the existing file).
Download Patch for Trillian 0.74
Download Patch for Trillian 1.0
Download Patch for Trillian 2.0