@1 - No need to reconfig your flows. Keep it coming to additional poller. You have to install NTA additional poller on your NPM AP machine and it will work (you can download it from your customer portal).
@2 No additional license needed. NTA additional poller requires NPM additional poller so if you already have license for NPM AP you can install NTA AP
MCClaidw, Along with Michal's comments, keep in mind that NTA is limited to 50,000 flows per server. So yes, install NTA on your APE, it will recognize immediately that it's an APE level install.
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