If you aren't ready to pay for a Pro key, you don't need to risk your PC's security. Several free tools offer similar functionality to Geek Uninstaller Pro:
Allows you to select multiple apps and remove them in one go. Geek Uninstaller Pro 3.3 Key
The standard version is still excellent for 90% of users. It performs a deep scan for leftovers and is completely free. If you aren't ready to pay for a
Deletes stubborn programs that refuse to uninstall via the Control Panel. It performs a deep scan for leftovers and is completely free
Pro versions rely on frequent updates to stay compatible with new Windows builds. A pirated key usually breaks as soon as the software tries to "phone home" to verify the license.
Most "cracks" for utility software are shells for info-stealers or miners. Your antivirus might flag them, and while some claim these are "false positives," they often aren't.