I know that you are exacted as much as we are, but please before upgrade - make a full backup! Always ! Then upgrade (re-install), then clear in Browser and Joomla! all cached files.
SP Page Builder Frequently Asked Support Questions and Answers
Make sure that you have PHP 5.4 or higher ! We recommending to use PHP 5.6 or 7.0.x
Note: Read SP Page Builder (Pro) 2.x manual & tips:: https://www.joomshaper.com/documentation/joomla-extensions/sp-page-builder-2-x