This is a tool to decrypt and reencrypt Touhou 6 score files
Just grab the release in the releases and run it on the command prompt
EoScoreDecryptor.exe [input file] [output file] decrypt
EoScoreDecryptor.exe [input file] [output file] encrypt
Input as in score.dat (for exemple) and the output as whatever you want.
The source code is in C++, works with any compiler with the C++17 norm.