I have recently been testing v4 of the Add-in. We are current using v3.3.
I am unable to work on several workbooks that have the same connection/model at the same time. V3.3 allows for several workbooks to be opened at the same time.
I would point to several systems that allow for this, namely, Smartview (Oracle) and BW Analysis (SAP)
This is not a viable in an environment where we are working with several workbooks at the same time.
We will not be able to upgrade to V4