Today I purchased a SnagIt license and needed to change the serial number that was being used by my current install. I asked support and it seemed they wanted me to re-install the software. A quick googlin’ and I found an article explaining that the license key was stored in C:\ProgramData\TechSmith\Snagit 13. In this folder are two files called RegInfo.txt and RegInfo.ini. I renamed both of them to *.old. Next time I opened SnagIt I was offered the standard trial screen where I could enter my new serial number.
I’m a big fan of SnagIt for my screen shots. I do a lot of procedural documents so I often use the auto incrementing stamps.