If Avast antivirus removed your files, they may be 'quarantined' (put in a 'vault') recycled or something. Maybe they can be restored? Check if the antivirus can provide more info. If you made a library of the models, you will be looking for .sh3f files originating from a userdata directory [font=courier new]........./eTeks/Sweet Home 3D/furniture[/font] , if you just added them to the catalogue, look for files with names similar to [font=courier new]Furniture-3-3429939141839172619.pref[/font] from [font=courier new]........./eTeks/Sweet Home 3D/[/font] . ok