Hello!
My digispark attiny85 got firmware version 1.6 and I read that 2.x is the newest one. So I tried to use the "burn bootloader" inside arduino IDE (2.0.5-nightly) but I get the error message "Property 'bootloader.tool.serial' is undefined". Googled + checked this forum and apparently this is a common problem and i've seen alot of other devices get some "one-liner" to put in a .txt file inside:
\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
but i havnt seen one for my device.
Sorry for the vague information but im a newbie. Thanks in advance!