Installing smartclient on RoR

Hi,
is it possible to install smartclient on RoR?

In the RoR setup the public directory is mapped to /assets/...
Thats means, if I copy the isomorphic directory to my web-root, the sources are available under /assets/isomorphic.

When I start my application I always get the error:
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This copy of Isomorphic SmartClient is expired. See http://www.isomorphic.com for a renewal.
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Any ideas or solutions?