We have developed a new programmer to support the Yubikey 4 & Yubikey NEO
Here is a direct download to the installer http://storage.scorpionsoft.com/apps/2fa/YubiKey/YubiKey4/AASoftTokenYubiKey.msi
Please see this article for usage informaiton https://help.scorpionsoft.com/entries/26000248
Questions?
If you have any questions or need some help, we would be happy to assist. Open a case at kaseya.zendesk.com