Re: LEM newbie questions about upgrade from 6.1 to 6.3.1 HF6

Thanks for reaching out, a few of things:

1. Here's our upgrade guide in the Knowledge Base with a lot of the information you're going to want to know:  SolarWinds LEM Upgrade Guide - SolarWinds Worldwide, LLC. Help and Support
2. Additionally, each upgrade and hotfix will include Readmes on how to do it.
3. The Upgrade and Hotfix are pretty similar processes at a high level as you suggest.
4. You may want to additionally review the Release Notes for each version if you're researching what was fixed, new features or other issues:

LEM release notes version history - SolarWinds Worldwide, LLC. Help and Support

SolarWinds Log & Event Manager (LEM) 6.3.1 Release Notes - SolarWinds Worldwide, LLC. Help and Support

From memory most of the new issues had to do with vulnerability fixes or adjustments to features added to the LEM in 6.3.1.  There's no significant change in how the logs are handled that I can think of.