[DRG]

Once you add a new SHP, BIGNEW.shp is created. If you have further editing you use that NOT the original SHP. When you are done normally you delete the old shp and rename BIGNEW to that deleted SHP's name but when starting out I would recommend you simply rename Icon0095.shp to XIcon0095.shp then rename BIGNew as Icon0095.shp as a safely.

Ignore NEWSHP

BIGNew gets created in the SHP folder of the file you are editing. I've never seen this lock issue

Don