Foundry NAV BAR and rapidcartpro

Hi
,
I am using Foundry and rapidcartpro. I know my around rapidcartpro but have come up with an issue.
I have installed a rapidcartpro store page on my website and have ticked the box to not show in navigation. I have put a rapidcartpro GRID stack on my home page index.php. My problem is that I am
unable to navigate back to home page from other pages in the Foundry Stack Nav Bar. I can navigate between all the other pages but can’t get back to home page. Before installed the rapidcartpro grid stack things were ok. If I delete the grid stack from home page this does not resolve the problem. I have sent Rob at foreground a help message. Have any foundry users successfully installed a rapidcartpro grid stack on their homepage. I have published to server and local server in testing.
Am I missing something obivious ?
Thanks folks

SOLVED. updated rapidweaver via all updates from version 8.02 to 8.5.1.

I also put a drop down menu on the home page link. This was the main cause. Once removed all OK.
I had forgotten about that. Basic mistake on my part.

Nothing to do with Rapidcartpro which I have been using for quite a few years and recommend it.