Polygons for Ukraine has been updated. The only change is that the regions are now using English names instead of local names. Not a single vertex has been changed besides that. It's based on the same data dump as before.
We tried to import new data from OSM, but we can't figure out where the region polygon for
Autonomous Republic of Crimea has gone. We also had some issues with counties, but we didn't really try to solve that since the regions had issues anyway.
For now, we are stuck with our data which seems to be from June 2015.