Hi Erik,
All of the settings and tags are stored in 2 text files, config.txt and comcfg.txt on the Flexy. You can download the files by either using FTP, the UI (under Diagnostic/Files Transfer), or using eBuddy to make a backup and extracting them from the .tar file. You can copy and paste your tags and then upload the new config file with FTP and the tags will be appended.
You can also use the Restore option in eBuddy to completely copy an entire device to another, however, this also copies the Talk2M info which needs to be unique to each device, so if you use this method you will want to make a backup of the device before running the VPN wizard.
Kyle