If you get an error relating to SourceResult or if not all strings are getting decrypted, it is because DashO's flow obfuscation was applied, which messes with the string decryptor. Run dasho.FakeExceptionTransformer and/or dasho.FlowObfuscationTransformer first, and you will able to decrypt all the strings.
dasho.StringEncryptionTransformer works the fastest (and it cleans up properly), although in rare cases where it doesn't work (you get an error not related to SourceResult), you can use dasho.string.StringEncryptionTransformer.