I'm having major major issues with the GUI wallet. It stays stuck at loading once it's opened. If you close it out and try to open again it does not even open.
What the frigging fuck?
Delete the Programdata\sumokoin and Programdata\sumokoinGUIwallet folders and reinstall (the fact that is not opening when you close it, is cause the process is still running and has to be killed by using the task manager). Restore from seed words when you succeed. If all else fails open an issue on git.