OLED on Atiny85

I have been trying to load the tinusar ssd1306xled library. I have the zipped folder in my download folder but when I try to add it to the Arduino Libraries I get the following message:

Specified folder/zip file does not contain a valid library

Has anyone had success interfacing on OLED to the Attiny 85? I could use some pointers. I've been working on this for hours. Not much good information on the internet. Every example, the software will not run in the IDE.