OK SolarWinds Folks...where do you hide the previous version documentation?

I know they are included with the download bits, do you still have your 11.5.3 .zip? 

You can find the NPM 11.5.2 Administrator Guide here:

https://support.solarwinds.com/@api/deki/files/23288/OrionNPM_11-5-2-2_AdministratorGuide.pdf

That PDF was in the "Using NPM" section in the middle column when visiting the Success Center link below:

Documentation - SolarWinds Worldwide, LLC. Help and Support

I looked for some other versions but it appears they are a bit out of the way at the moment.

There is a bit of a transition and re-organization going on with the Success Center right now, which I might add has been very helpful and is going to make everything much easier to find in the long run.

I would kindly suggest leaving feedback using the "Was this article helpful?" section to the right in the Success Center link above, as I can attest the organization is paying VERY close attention to customer feedback at the moment.  You can also e-mail Customer Success here: customersuccess@solarwinds.com

I still had the 11.5.3 zip file but the documents are for 11.5.2 so that link above should work for you.