Hi, congratulations for your plugin, great work.
I would like to report a bug. When minimu is activated, woocommerce does not list or show products. It seems the same problem that some other users have commented.
I have investigated and discovered that it works when no categories are selected for any domain. The cause of the problem is your function filter_posts_where(). It should test if post-type is "post" or "page" as you are filtering by "categories" taxonomy, that only applies to these two post-types.
With other post-types, as "products" in my case, filter should be inactive. If not, minimu filters ALL posts.
It seems easy to change, may be in your next version?