ePolicy Orchestrator 4.6.1 Upgrade

"This is the ePolicy Orchestrator 4.6.1 install. This release can be used for a first-time installation or for an upgrade from McAfee ePolicy Orchestrator 4.0 Patch 7, or McAfee ePolicy Orchestrator 4.5 Patch 3 (or later), or McAfee ePolicy Orchestrator 4.6.
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Release Notes:  
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In this release, support has been added for the following:

·         Firefox 4.x and 5.x browsers

·         Internet Explorer 9.0 browser*

* Full compatibility with the Internet Explorer 9.0 browser is defined as running in Internet Explorer 9 (Browser Mode) and Internet Explorer 9 standards (Document Mode). In ePolicy Orchestrator 4.6.1, some web pages must be run in the Internet Explorer 9 Compatibility View (Browser Mode) and Internet Explorer 7 standards (Document Mode). For more information, see the Microsoft documentation on the Internet Explorer 9 standard."

...aha

OK, let's have a try.

First I will backup the system and then upgrade. Then I let myself surprised again.