Back in October 2008, I posted the registry hack to bring the AEC Layer Filters into Civil 3d 2009. After removing some gremlins in our 2010 template, I’ve lost my layer filters in 2010. After quick Civil3d.com search, I applied the hack, issued the command CLASSICLAYER, and was very disappointed last Friday.
Do not dismay! To my pleasant surprise, with the crowd cheering in the background – the hack works on the Layer Property Manager now ! 
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