FSX Iceland revisited - terrain scenery

OK I can understand that !
My question is simple : should I remove the Iceland demo scenery (from ORBX) and just install "Iceland_revisited2017_beta_10.zip" ?
Thank you for your help !
That would be wise if you do not have other Orbx scenery installed. If you do have e.g. Europe scenery, no sweat, but if you do not, it makes (or already has made) a mess changing things in the default scenery and textures (at least it did when I removed it about 4 or 5 years ago) and after uninstall you are left with areas without landclass!
I still have the old Iceland_revisited 2013 and I like it better than the Orbx stuff.