Has anyone successfully upgraded to 5.7.3 manually? We have a 5.6 site with some custom modifications so we cannot run the auto-updater, and our developers are running into issues implementing encryption keys.

Initial email response from BV:

Encryption keys should be written to disk when created, then pulled into the app variable at run time. You can call a method to load the encryption keys from disk again. This is normally called in the global.asax file.

From our developers:

We have been able to do this (i.e. app variable at run time by calling already available method to load the encryption keys from disk). But the problem occurs at the time of decoding using the new key’s value. We get an error on the order receipt page (i.e. /Receipt.aspx) that says:

BVSoftware.Payment.AesEncryption.Decode: Invalid length for a Base-64 char array.

We are hoping to get a sample value that must be set to the application variable so that we can have our local key tested. FYI, we are having a key generated which in JSON format looks like:

[{Key}]

Thank you for your help!
Greg