These fake keys are often blocked in newer WinRAR versions. When you update the software, the key stops working.
Before diving into activation keys, it is important to understand why the "64-bit" distinction matters. Winrar Key Rarreg.key 64 Bit
In the structure of WinRAR, rarreg.key is the actual license registration file. Unlike some software that uses a long serial code that you type into a box, WinRAR’s licensing mechanism is file-based. These fake keys are often blocked in newer WinRAR versions