How To Edit Google SEO Url's From "Thread-" to "thread/"?

[Greg Winston]

Hello,

I tried editing the titles from the Google SEO plugin from:

"Thread-" to "thread/" and
"Forum-" to "forum/"

So I added a forward slash instead of hyphen. But when I did this it adds "thread" onto "forum":

url.com/forum/thread/Title-goes-here. <= This gives a 404 error.

Is there a way to replace the hyphen with a forward slash? I can pay you if required.