Hi, Randy. Thanks. I actually have my "old" matches in four different places.

I downloaded the V1 matches from ancestry.com (see other threads on how to do it) but I also did a download of all my matches about two weeks ago using Jeff Snavely's chrome ancestry helper which is still working so I can very quickly find out if an "old" match is still around. For anyone else who had previously downloaded your match list with his chrome extension, when you use his tool to search (using the search user name box with his tool, not the ancestry.com surname search), if the match has been removed from your list, you do still get a special pop-up from ancestry that spells out the fact that under their new system, this person is no longer a match. If you were not using the chrome extension before the purge, you will not get that notice when you try to search using names from your V1 list (however you will know that you once "had" the person and any notes you previously made.)

Fortunately, I had also uploaded all of my ancestry.com matches using the chrome extension csv file to genomemate so I can easily search out similar names from my old ancestry match list and any names from gedmatch and FTDNA and 23&me. I don't think the v1 cvs file can be uploaded to genomemate, or at least not yet, so if you weren't using the chrome extension, your options are somewhat limited.

Finally, of course, before these neat new tools were offered, I have an excel spread sheet with old ancestry.com dna matches group in likely surname clusters.

So I feel quite lucky to have multiple ways to cross check old and new names from ancestry.com against matches who have uploaded to gedmatch, FTDNA, or 23&me where you can actually see where and how much dna segments you share.

If you haven't done it yet, I strongly urge everyone to transfer your raw data to gedmatch or FTDNA so you can see and analyze your matches and notice differences between how each place reports or doesn't report the same match.