Sorry for asking something that might have been asked before (possibly many times) but I was an ICO investor in this and actually cashed out a couple months before Iota launched on the first exchange (whatever it was.)  Sold my stakes on the OTA chat.  Anyway, I doubt I kept a "few" miota or anything, but I'd like to check.

Is there a way to check my really old seed?  Firefly isn't finding anything when I import my keys, but I'd at least like to see my old transactions.  I know I've kept all my keys, but I can't figure out how to update them to the current iteration of Iota.  Thanks.