hi, my computer recently crashed and I had to reinstall the OS, I am I using a iMac High Sierra. So I had to reinstall all software including DropBox. And I knew it was going to take along to sync everything again. DropBox appears to be up-to date, but when I try and open any file on my computer I get errors like this: https://www.screencast.com/t/IPjexGUU Is this something to do with SmartSync? Which I have no idea what that means? And everytime I try to look at sync preferences the Dropbox system crashes! Confused!