Toolbar Icons do not display on Windows

Hi everybody,
I am writing a simple database app (using Mac Xojo IDE) that uses a Toolbar. When I run the app on my Mac, all the icons on the toolbar display as expected. However, when I build and run solution on Windows, the icons are not there. Instead, I see black squares in the place the icons should show.
Has anybody had a similar issue? Any tips? Any help would be much appreciated.

Sounds like the Haswell chip set issue. I think it’s supposed to be resolved in the next release. There may be some suggestions in
this conversation.

I tried deleting the cache as Christoph Louven suggests and … it worked!
Thanks a lot for your time.