epson printer not working properly again

Upgrade to what? Have you done the obvious, i.e. clean the nozzles?

Did you try this: Reset the printing system on your Mac - Apple Support

Did you try reinstalling the latest drivers from this Epson page: https://www.epson.co.uk/gb/en/viewcon/corporatesite/products/mainunits/support/1 2299

That printer is supported by Apple's Epson drivers.

So I would download Apple's Epson drivers, which were last revised in late January, 2016.

Epson Printer Drivers v3.2 for OS X