Capitalize Permalinks

Hi:

We need mixed capitalization in our links.

We need to display our links as follows:
site.com/FreeMovie

But WP displays it as site.com/freemovie which is a different URL due to capitalization.

We installed a plugin:
https://www.ads-software.com/extend/plugins/title-capitalization/

But it does not do the job as we need.

Any clues in how to solve this issue?

Thanks,

Charles