Hi Guys
As mentioned, trying to upgrade from 1.4.7 to 2.0.
v1.4.7 (build 20151124)

Backed up DB
Replaced files with new 2.0 versions
Amended config.php and /add-ons/k-functions
navigated to /couch/
Fatal error: Cannot make non static method KUserDefinedField::handle_params() static in class Nicedit in D:\xampp\htdocs\***\couch\addons\nicedit\nicedit.php on line 212

Navigated to /couch/upgrade.php
Blank page, no error messages, nothing showing using Chrome Dev Tools

Any ideas?

Unzipped files from download folder a few more times and it's kicked into action?