The Spreadcoin wallet is pretty unstable. That's why I'm not keeping my SPR on there until they say we need to. It is safer on an excahange. My wallet went on a fork the first time I DL it. The dev said delete every file and reinstall was the only option. Since I hadn't backed it up yet, I would have lost all my SPR if I had already sent it.
So try to avoid using the SPR wallet.
I've held Spreadcoin for around 3 years+, and mined it for about a year+,
and suffice to say, I've never had an issue with the wallet. (That includes the version I had before the current one.)
Though I did at one point, erroneously think the vanity address generator was broken.
But once I figured out what I was doing wrong, it now works great. Its an awesome function, I might add.
It's actually been one of the most stable, reliable crypto wallets I run on my pc.