I got a TinySaber at the Detroit Maker Faire last weekend.
(my wife also got a Tiny Piano )

using arduino IDE 1.8.5
board: "TineSaber Rev2"
programmer: "arduino as ISP"

trying to upload the sample TinySaber code.
the sample code does verify.

this is the output from upload attempt.
Running Digispark Uploader...
Plug in device now... (will timeout in 60 seconds)
Warning: device with unknown new version of Micronucleus detected.
This tool doesn't know how to upload to this new device. Updates may be available.
Device reports version as: 2.3

What am I doing wrong here. 
Thanks for any help.

Roger.