Raudus supplies only .ppu files in the package (no sources), so is completely specific to the compiler version and Lazarus release the supplied distribution was compiled for,
i. e. the two releases Mica indicates (Raudus provides two packages in two appropriately named directories).
Unfortuately the example programs are all installed in a Program Files (x86) subdirectory, which means Windows won't let you compile them, so they have to be copied elsewhere before you can make progress.
Howard