Running r2rcerttest.exe confirms that the certificate is properly installed and that your system will trust the modified R2R binaries. How to Use R2RCERTEST.exe
If you download an R2R release from an untrustworthy, public torrent site, there is a risk that someone else has added real malware (like a coin miner) to the legitimate r2rcerttest.exe. r2rcerttest.exe
Typically, the file is used after installing the R2RCA.cer certificate. Here are the common steps, as outlined by Scribd : Running r2rcerttest