I just found my old wallet for original NEOS, created on Aug20, 2014. I remember I dumped some quantity there to wait out when the price started to decline, until I completely forgot about them. Is there any chance to swap those for a new coin? How can I check the balance on the wallet? I have DAT file and probably some records on Bittrex, but can't find original windows wallet for private keys pull. Got blockchain files though

Can anyone advise me on this one? Any help is appreciated. Thanks.
If they weren't moved since then, what you can do is dump the old wallet or dump the individual private keys, download the new client and import into it. Your balance should be right in there. Mind you, don't let it be a shock when it's considerably smaller than what is on the old network as there was a coin swap and reduction that took place.
Thanks 2turtles, but I would need old exe file, I can't dump privkey without it. Can you please dump it somewhere for me please? Thanks.