New to Adobe Acrobat DC - No 'edit PDF' option in the tools menu

Un-install Acrobat Reader and repair the installation of Adobe Acrobat.

Hi there Default,

This is because Acrobat is not like other programs AND most importantly, Editing in Acrobat should not be considered as editing in the application that created the original document. 

First off, to answer your question, to enter into the Editing capabilities of Acrobat, there are three ways to access Editing in Acrobat. 

1) From the Tools page:

2) From the menus:

3) And lastly it might be on the Right-hand Panel (and if it's not there you can place it there yourself)

Now, back to what I was saying about Editing in Acrobat, if you wish to change the date of an item, or fix a spelling or two, it's great. But if you plan on doing wholesale changes in the document, you are entering a full-scale world of pain. 

Always keep in mind that a PDF is a digitally printed document. If you take an actual printed document and see a miss-spelling, the only real thing you can do is to open up the original document in the application that created that document and fix it there. So, in this case, Acrobat is a blessing. But when it comes to major changes, like breaking a single paragraph into two (or vise versa), please lower your expectations. 

Simply, it's not possible nor realistic to expect Acrobat to have all of the Page layout options as InDesign, Word, or Illustrator, or AutoCAD, or Excel, or Photoshop, or Dreamweaver, or any other program all wrapped up into one piece of software. As explained in the previous paragraph, the fact that Acrobat can do what it can is wonderful, but that's as far as it goes. 

So if your needs are major changes, you have two choices: 1) Find the original documents and make the changes you want/need in them. or 2) If you do not have access to the original document, open the document in Acrobat, Export the document into one of the Export options that fits your needs, and export the document into Word, Excel, whatever, make the changes, and recreate the PDF.

I'm sorry but that's the reality.