I saw this post of Elaine
viewtopic.php?f=6322&t=126976#p168163
The Content component will remove and update the following folders below
Install_ Content.msi - Scripts, redist, SimObjects, Weather, Scenarios, Ecosystem, Fonts, Autogen, Effects, gauges, Sound, Texture
This process will only remove and update Default Prepar3D files, It will not remove or overwrite Extra files (non default) that you have in place from 3rd party software (Add On's)
I didnt install yet 4.1 (update only) but is it possible to install Client + Content only (for the rain effect) without reinstalling whole Sim? So to have my "old" SimObject's addons/ORBX and scenery ? Any advices or tips for this?
Maybe do the backup of: Scripts, Redist, SimObjects, Weather, Scenarios, Ecosystem, Fonts, Autogen, Effects, Gauges, Sound, Texture folders and after this copy and past without overwrite option? What do You think?