Calibre conversion is not using my command

[ryder]

Hey everybody,

I am trying to change the css of an epub with Calibre conversion, but it's not working at all.

All I want to do is to change it from this:
</span></span></p><p class="calibre_">

to that:
</span></span></p><p class="calibre_"><br/>

So I just want to add <br/> at the end. It is not working through search and replace and also not in the Look & feel tab.

How is it possible to change it without going to edit the book and use the search and replace option there?

Thank you.

Edit: sorry, I've posted it in the wrong section.

[icearch]

Post example file if that's possible.