The current silkcoin wallet freezes up on me often. I have tried it on Linux and Windows. It seems to get worse with every stake reward I get. Other PoS coins have this same problem but I hope you fixed it with the new version.
I've noticed the same issue, it is why we are looking into loading private keys into the weaver for swap. To make the process less burdensome.
On my Windows 7 64 bit laptop is running without troubles. Always syncing and staking correctly. I'm using the latest version available here.
So to me what you say sound strange.
Maybe try it on a different machine.