Hi thanks alot for quick reply. You shouldn't have any problem with both versions coexisting in the same machine. Your problem may be that your machine's AssemblyFolders for TeeChart now are pointing to the v2009 assemblies. You could try removing them as described here. I dont have older version in...

Hi, our software refers to "TeeChart.dll" version 3.5.3330.21113 Recently I received license for version 4.0.2009.21354 , I tried installing previous setup (3.5.3330.21113) with this new license. But with this new license I was not able to install previous version. It will be difficult for us to cha...