It's not available for subscription customers yet. It's still in Labs. What that means is it's available for anyone to try but treat it as beta software. Most of the labs installs have a timebomb so they will no longer work after a certain date (not sure about this one) so if you are using it for critical project stuff, it might stop working on you.
Has this been released for Civil 3D 2013? If so, where can download it? I purchased RiverCad from Boss back in 2009 and now I cant use it.
No because Autodesk bought them then basically pulled the plug. We are as upset as you are.
They made it as a labs download for C3D2012 with a timebomb on Dec.31, 2012.
Then extend it (after pressure from the customers who use it) until June 30, 2013 and make it only available in C3D2014..
But then announce that it is only available to IDS Ultimate customers.
Then they cave in maike it available as a download to Subscription customers.
Then pull it within 24 hrs.
Not sure why this is even an issue for Autodesk. You have customers who purchased the BOSS products years ago and then you take it away from them and can't make up your minds whether to give it back to them or not. This is no way to treat customers who have been loyal for years using your products.