visit here : Product Upgrade Advisor | SolarWinds Customer Portal
Plug in your product numbers and follow the steps.
[in my environment we only upgrade one product at a time, it makes troubleshooting issues easier]
it doesn't have DPA in there, but apart from that it looks like this:
Upgrade Network Performance Monitor from version 11.5.2 to version 12.0
Upgrade IP Address Manager from version 4.3.0 to version 4.3.2
Upgrade Network Configuration Manager from version 7.4.0 to version 7.5.0
Upgrade Web Performance Monitor from version 2.2.0 to version 2.2.1
Upgrade Network Performance Monitor from version 12.0 to version 12.0.1
Upgrade Server & Application Monitor from version 6.2.1 to version 6.3
Upgrade NetFlow Traffic Analyzer from version 4.1.2 to version 4.2.1
Upgrade Network Configuration Manager from version 7.5.0 to version 7.5.1
Well since we did not do the 11.5.3 NPM upgrade we had issues with the DataBase and had to engage Solarwinds for Several hours to get it to work. But we are on the right patch now....