Can I upgrade the AEC firmware directly from 2.1.8.5 through 2.1.9.3 to the latest version 2.1.9.5 v1?

Unfortunately you can't do a direct upgrade to the latest version as there is a security vulnerability patch that isn't in the 2.1.9.5 firmware.

You would need to upload firmware 2.1.9.4 FIRST and then you can got to 2.1.9.5

The 2.1.9.4 firmware is available on our website with the file name - Software (AEC2.1_FIRMWARE_Upgrade (Archive)). It contains versions 2.1.8-2.1.9.4