Launched Quicken and when initiating OSU, got about half way through, then crashed (said Quicken had stopped responding). Relaunched ran OK. Launch OSU, OSU completed OK and displays there's an update. Didn't apply update in order to complete, accept and reconcile downloaded transaction. When done, did the update. Once done, closed Quicken, relaunch, started OSU (completed, no transactions), ran a few searches, and reports. All good so far! :)
So just letting everyone know the new version is getting rolled out. Take whatever precautions you feel necessary (like manually backup your file, adjust Windows UAC, etc.).