Thank you, [:)]
but....... I do not know about the whole guide, but just this fragment is not translated correctly, that is:

in English:
To uninstall a SH3F file, remove it from the furniture plugin folder of Sweet Home 3D....

in Italian:
Per disinstallare un file SH3F, rimuovi il rispettivo plug-in contenuto nella cartella furniture di Sweet Home 3D ....

In fact it is written in Italian: To uninstall a SH3F file, remove the corresponding plug-in in the furniture folder of Sweet home 3D .......

[:(] .....