Bulk Rename Utility

I can't find a way to do this:

Let us say I have multiple files the names of which are interspersed with periods(.) e.g.
This.is.the.file.txt
This.is.the.second.file.mdb

The output I want:
This is the file.txt
This is the second file.mdb

If I use replace "." with " " the period which specifies the extension is also removed. Is there an option that prevents any changes to .xxx where xxx is the file extension? i.e. Do not make any changes to the last 4 characters in the files I want to rename?

Thanks.

Hi, use the option to ignore file extensions in the Renaming Options menu.

OK. Thanks.