Question

How can I update with a gedcom file from my PC?

Answer 1

If you mean where to load a gedcom up to WikiTree, go to your Menu, and drop-down from My WikiTree to GEDCOM.

https://www.wikitree.com/wiki/Special:UploadGedcom

Comments

Other ways to add family > https://www.wikitree.com/wiki/Help:Adding_Family

Answer 2

Thanks Maggie,

I have now looked there but states it will only take up to 5000 people, I have now expanded the question to ask if there is any way to load up my family tree of 14,650 people. this will include the Dorey, Watson, McLandsborough families.

Comments

There is no way to upload 14,650 at once.  You will have to split it.
https://www.wikitree.com/wiki/Help:Splitting_a_GEDCOM