I'm upgrading from LR4. It's taken 45 minutes so far, and the progress bar hasn't moved in the last 40. It says it's "Preparing new searchable data." It's a fast i7 and the software, OS and catalog are on an SSD. Task manager reveals it's doing basically nothing, not running the disk or the CPU. Just wondering if this is typical. There are maybe 50k images in it, most of them currently offline. I kinda suspect it's trying, and retrying, and retrying, and retrying, to reach images on a network server that is not available.