i had RBY into my old wallet (too old to sync) and i can't get them back into the last version of the wallet (even when it finished sync)
It's not possible. It swapped to a new chain over a year ago and it took place ONLY at Bittrex.
what he said is also true.
Poloniex participated as well.
rubycoin version v0.8.6.2-unk-beta
Qt version 5.2.0
It's much appreciated that you supported the project early on, when it was worth close to nothing. In 2014, action was required on your part. Although not ideal, with the constant attacks happening towards proof-of-work coins, and the realization that only a few of the largest proof-of-work coins can be adequately secure, it was necessary. It's regrettable that the upgrade had to be done that way, but most made it over to the new blockchain. Checking in once or twice a year would have been enough to avoid any issues.