In the module paramater you will have set the number of items per row away from 1 to another number which tells BC to go render it in a table.
Use this tag on your overview layout to render list style on your items
That is not really helpful, That is the tag for products in the overall layout and this is talking about web apps
oops, my bad
Liam is absolutely right, if you define any number for 'items per row' in the module_webapps tag BC renders the webapp list as a table. Once the number is removed BC will render whatever you have setup in your webapp list template. Hopefully this will be updated in the BC documentation soon as it is not clear that tables are used here by default.
Had a look at the demo site link, love the design.