Thanks, I guess I should have ask before actually trying it. I only did one install of stable intending to switch to beta, & go back to stable if needed. In the middle of that, I thought I have the room, I'll just run both versions. I copied & saved stable install, & tucked it away. Then change to beta, pasted stable back next to beta, & pasted saved games folder back. Everything works fine, except when I start stable from the desktop icon, it doesn't update, & have to click on the updater. I'll have to wait for a beta update to see how that works.