APC AP77xx ATS firmware upgrade from 3.9.2 to 3.9.3

[MateFekete]

I found the following APC FAQ article about Treck TCP/IP Vulnerabilities (Ripple20)

The latest firmware version for APC AP77xx ATS is 3.9.3 which is fixing above mentioned bug.

I manage quite a few these type of devices in various locations and in the past I did the following exercise which was a pain:

"Before beginning the update process, the unit should have the secondary (non‐loaded) input power source
unplugged. Failure to do this WILL cause damage to the unit when it resets after updating."

At that time I followed this documentation: https://www.apc.com/us/en/faqs/FA156178/ 

Now, as new 3.9.3 has been released, should I follow the same procedure if the device is running on 3.9.2?

Or at this time can I perform upgrade remotely without removing the secondary input source?