I am unable to send Sianotes and message to redeem on NXT Wallet, get message "Feature not available" in NXT wallet, Windows 7, client 1.5.9, wallet 1.3 .
There's not much we can do about that, but maybe the nxt devs can help you?
Things seem to work fine for 1.4.18.
Tried using online wallets listed on nxt.org site - one requires registration, the other won't let me sign on with passphrase only, seems to want some other ID from wallet, the third link goes to a site which does not show a wallet anywhere.
Tried downgrading NXT client install from 1.5.9 to 1.4.18. Now the NSR server crashes when I try to launch wallet. I'll probably have to manually clear everything off the computer for NXT and do a clean install. I estimate I'm already 4 hours into trying to redeem these Sianotes overall, between reading on how to do it, downloading, installing, and creating the key, and trying to send the transaction to redeem the notes.
I do onsite computer service as my main business, and can say for a fact not one of my customers would be able to use this for any kind of business.
I believe the problem with 1.5.9 is you have to update to java 8. Get java 8 then "install" 1.5.9.