Moving to PM 13.11 indeed requires some infra updates at isolated environments. There are two options to update virus definitions at PM, one for environments where PM host has network connection to the internet connected host: https://help.f-secure.com/product.html#business/policy-manager/13.10/en/task_777302598FA64ADDBCC8044...
And second one, where PM host is totally isolated and you are using some USB stick to transfer files: https://help.f-secure.com/product.html#business/policy-manager/13.10/en/task_957E20DBBA344DF3A8B1B70...
You need to accomplish steps 1-5 only once and run steps 6-8 from time to time like before with fsdbupdate9.exe tool.
If you experience some problems updating virus definitions at offline PM please describe your problem in more details.