MarketPress has some sort of Conflict

Before I give up, can you maybe see how to get around the problem I'm having here? It seems like something simple, having to do with directory names.
I thought maybe it would help to change the store's directory name from /products/ to /store/ but no good. < this works but it still provides an old link to /products/ which does not work. I cannot reach the new page even by substituting /store/ in place of /product/
So I tried adding a new item and still nothing. < it still wants to use /product/ but /store/ does not work either:
This is an old page whose name might be interfering somehow.

Any advice?