[ton414]

Plutonium is not compatible with UP 3.0, but I'll use it as an example.
The folder name that has the mod does not matter, but it is very important the internal names and the structure.
The structure of folders would be the following:

C:\Ubisoft\IL-2 Sturmovik 1946 UP 3.0\#UP#\0_0_Plutonium_Universal_Max_Effects_V1

And into the "0_0_Plutonium_Universal_Max_Effects_V1" folder: