I just updated the Ultimate SEO 2.x plugin to Ultimate SEO 2.105. Seems to work fine.

All that will be required (once it is released) is to uninstall and reinstall using the plugin manager.

Currently I only release plugins together with the corresponding ZenMagick version. Once ZenMagick hits version 1.0 and the API becomes frozen, it should be possible to update and release plugins independently.