I gave up on Whitecap as it got too repetitive too quickly for me. I can confirm that both Aeon and G-Force are working fine with v18 here.
Note though, that after uninstalling v17, I needed to reinstall both visualisations for them to work again (despite them being shown as options in v18). This is because they worked in v18 by referencing the dll files under the v17 installation. Removing v17 also removed the dll files, but not their references in the v18 part of the MC registry.
Could this be the case with your Whitecap installation too?
-marko.