Removing .'s, but not all .'s

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I have :

LoremIpsum.14.11.19.Word.At.Another.Word

And I want to make it:

LoremIpsum.141119.WordAtAnotherWord

Can anyone help?

EDIT: And sometimes I have:

LoremIpsum.14.11.19.Word.At.Another.Word.Name.Names

And I want to make it:

LoremIpsum.141119.WordAtAnotherWord.NameNames

[bluenote]

I am experimenting with something like this:
{\.\d\d\.}{\.\d\d\.} but that only allows me to reorder, which I don't want to do, but it still escapes me how to remove the middle .'s
Any pointers is appreciated thx

EDIT: I reproduced my string above incorrectly I'm now having some success with:

(.*\.)(\d\d)\.(\d\d)\.(\d\d)\. Which allows me to remove those first couple of periods between the digits.

What's remaining is to remove the .'s between words in the latter half of the file name. I can understand how to do this like:
\.([A-Z][a-z]*)\.([A-Z][a-z]*) , but then it only matches if all my filenames have the same number of words, which of course they do not.

How can I make \.([A-Z][a-z]*) repeat the way I want it to?