The STOPDecrypter gave me this warning, but I've managed to solve this. It's because I need to update my Net Framework.
And now the STOPDecrypter gave me this
[+] Loaded 43 offline keys
Please archive the following info in case of future decryption:
[*] ID: PpzYa3nBba2MZq4MUGgxoZcZ7cbXBKtzNcipyRt1
[*] ID: HgUNhAuveBRDLf4pEKIYrn6MGAEdovUjLQ4RNz9Z
[*] MACs: 00:FF:15:DB:D5:11, 50:B7:C3:BB:37:96, 50:B7:C3:BB:37:95, 50:B7:C3:82:92:98
This info has also been logged to STOPDecrypter-log.txt
Decrypted 0 files!
Skipped 138 files.
[!] No keys were found for