Running ECO6 and ECO5 on the same machine does not work out of the box.
ECO5 is best used with VS2008, and ECO6 is best used with VS2010 but still, installing ECO6 seems to break the ECO5 installation. What to do?
The issue seems to be the searchpath for assemblies that VisualStudio uses – the whole GAC vs Searchpath strategy in VisualStudion I will not go into here.
This is the workaround
To run ECO5/VS2008 – rename the ECO6 bin directory before starting VS2008: C:\Program Files\CapableObjects\ECO\6.0\bin -> C:\Program Files\CapableObjects\ECO\6.0\binX
Now you can run ECO5- VS2008
Make sure to fix the bin folder name before starting VS2010…