>>13841
Hey, sure–the main tool you want here is a 'Hydrus Tag Archive', which is a portable tag database you can import from or export to. You can generate one of these using services->tag migration. In your old client, move all your tags from 'my tags' for 'my files' to a new HTA, and then import that HTA to the new client using the same dialog, but this time set it for 'all known files'. When you export/import your files over to the new client, your tags should be waiting for them when they arrive.
This is an advanced operation, so make sure you have a backup of everything before you do it, and let me know if you run into any trouble.