Comic Rack is kind of in a limbo state. It's not as widely used or supported as before, but it's not completely gone. Maybe it's on the decline, but it's not officially 'dead'.
Syncing comics on Comic Rack is quite straightforward. Open the software, navigate to the sync option. You might need to log in to your account if it's cloud-based. Select the comics you wish to sync and click the start sync button. Keep an eye on the progress and troubleshoot if there are any errors.
First, decide on the size and style of the rack you want. You might need some tools like a saw, drill, and sandpaper. After cutting the pieces, assemble them securely to make a stable comic book rack.
Loading Comic Rack for backup isn't too complicated. Just open the app, navigate to the settings. Usually, there'll be a 'Backup' or 'Data Backup' option. Click on that and it should start the backup process for you.