How do I turn off Auto-update? It keeps erasing my settings!

Opera keep erasing all my past tabs, history, settings every-time I reinstall!
Opera keeps crashing on me so i have to do a reinstall everytime I close Opera. Everytime!! So I reinstall and it takes 3 tries before it finally opens. And even though I always have my settings set on sync everything and log into my opera account, it never remembers all the previous info I spend 1/2 hour setting up. Erases everything! Extensions, setting, tabs, etc!! I love opera for how fast it works and when it works it is great; but what the heck is the going on here?