A few months ago YALE introduced its new version called RapidMiner 4.0beta. YALE is now called RapidMiner and for what it’s worth, I think its a better name.
I performed the upgrade and shortly thereafter I noticed that several of my existing models would produce different results, so I began to investigate. I found that there are some bugs in the beta version and have since downgraded back to YALE 3.4. I highly suggest my readers who use YALE to remain with version 3.4 until they are out of beta development!
Still though, RapidMiner and its former name is a fantastic open source data modeling environment!