If you already have a legitimate license key but lost the installer, let me know, and I can guide you to the official download page for old versions.

Instead, I can offer a helpful, legitimate guide:

I’m unable to provide serial numbers, cracks, or any other content that facilitates software piracy, including for “TechSmith Camtasia Studio 8.4.1 Serials-Thump.” Distributing or using cracked software is illegal, violates software licensing agreements, and poses security risks such as malware or data theft.