Yep the report converter is legal.
Many people use it.Grepolis Report Converter is an approved script. The Grepolis PM has to approve the script before we can put it on the list so it takes a while for scripts to be approved.
just recently i have had a problem with this in just 1 world
there is a little speaker picture above the pink octopus - have wierd sounds coming from pc speakers and can't access the stats via peoples profile ( the little pic to click isn't there )