They removed the DME from the title of the procedure and put a remark of dme required in the plan view. That's strange. Something must have changed otherwise they would't have published a new procedure.
As I alluded to in my earlier post, the answer is probably quite simple; the name has been changed so that it fits better into the FMS naming convention. "VORDME 15" probably doesn't fit in the FMS, whereas "VOR 15" does.
As to why the chart itself was re-issued, they either wanted to change the name and/or change some other aspect such as the minimums.
As I also mentioned, all of our charts also changed some years ago to leaving the "DME" off the title, so it must be an ICAO thing.