You have multiple installations of Karamba3D on your computer as it seems. There is one in “…Rhino/Plug-ins” and several in the packages folder. Try to remove the installations by deleting them from your hard disk. Then resinstall Karamba3D.
In your previous reply you list the “EPPlus-dll” instances that you found on your computer. The one from Karamba3D seems to be different from the rest. You could try to copy the version from SCIA to the karamba3D folder.
– Clemens