When you right click on your GeoPlan, you may notice that your GIS Layer Control option is grayed out and unavailable.
To fix this problem, first, make sure that your Map Control is not set to ‘None’ (Tools>Options>GeoPlan). You can check this from Tools>Options under the GeoPlan tab.
If it is set to ‘None,’ set it to ArcObjects (if you have a GIS license) or MapXtreme and restart ICM.
If the Map Control was already set to ArcObjects, then you may have opened InfoWorks ICM (64-bit) rather than InfoWorks ICM. Try opening InfoWorks ICM (instead of ICM 64-bit) and see if you can access the GIS Layer Control.
If this still does not resolve the issue, please have a look at the following blog post for some more ideas to troubleshoot this issue:
Let us know if you still cannot access the GIS Layer Control and that you have already attempted the above at email@example.com so that we can further assist you.