Download latest Evolve+ 2.6.0 from your account. https://theme4press.com/my-account/
Use FTP to download a copy of your existing version 1.9 and save as a backup copy.
Then deactivate and deleted your theme and install Evolve+ 2.6.0 manually.
Follow on screen instruction to install required plugins, such as reduxframework and theme4press core plugin.
Remember to clear server cache or cache plugin’s cache content.
Remember to clear browser history.
Your update from 1.9 to 2.6.0 will definitely give you a lot of problems because it a great jump from 1.9
I will try my best to help you out.
Do this only when you have the time and don’t freak out.