+ if( skaterift.demo_mode ){
+ if( world_static.instance_addons[index]->flags & ADDON_REG_PREMIUM ){
+ vg_error( "Can't switch to a premium world in the demo version\n" );
+ return;
+ }
+ }
+
+ world_instance *current =
+ &world_static.instances[ world_static.active_instance ];
+