C:\Program Files\WinRAR -> rarreg.key
RAR registration data
Administrator
Single PC usage license
UID=fd6135a1e56eb050da68
6412212250da68193d041e22400ef602620d2851234d20d8c7bb08
3ec5390cff97eb7b5d396035c6ab9048e2c5c62f0238f183d28519
aa87488bf38f5b634cf28190bdf438ac593b1857cdb55a7fcb0eb0
c3e4c2736090b3dfa45384e08e9de05c5860410a5fac9cd17bc101
da66b1a5363477fb576f775ae234265accd8681c50b6ea23f94d73
9db203594acfa63d90745dcba111c28681cb68ccdc19a59a600a31
007eeb2c3b16ae911e0535e7051e4ac412e62254b86e2437385566
Resource Hacker
File > Open > C:\Program Files\WinRAR\WinRAR.exe
Open > String Table
80 : 2052 > Delete 1272
F5 > Ctrl + S