You can safely get rid of these, if you want to take my word for it, that is. :)
I just keep adding to my list, and as you see, that extension you mentioned is in
the list.
~*.*;_*.*;*.??_;*.??~
*.000;*.001;*.002;*.003;*.---
*.CHK;*.Gid;*.OLD;*.prv;*.fts;*.ftg;*.grp;*.$$$;
chklist;*.ftg;chklist;*mscreate.dir