Hmm.. I had RPX in my neo-gui-rpx wallet, but after restarting it's gone? How do I get it back?
Also, is there a reason I can't claim GAS in that wallet? All GAS is listed in "Unavailable: 0.37xxx"
This may be a syncing problem.
One thing you can try is to re-sync from the start. Delete the 'Chain' folder and restart the wallet (probably a good idea is to backup your wallet first).
It will take a long time to re-sync but this can be speeded up by using the bootstrap file from here ->
https://github.com/CityOfZion/awesome-neo#blockchain-bootstrap-filesYou won't be able to claim GAS until the wallet has synced.