I updated to the latest version, got asked to enter my license key again (annoying), found where I'd saved it, and so far Scrivener is working. Haven't touched it since my last posts, I think I was on the **.14 version before.
After installing the latest version today, when Scrivener prompted me to update, I am having no problems with using Scrivener. Unlike the last defect, which was hitting everyone, this one seems to be user-specific. So it's a good idea to raise a ticket for your problem, and let L&L tech support ...