Assets stay on your PC: On slow or restricted connections, Miniko could hang for minutes at startup and then show the asset loading screen again on every single launch, even though your files were already saved on disk the whole time. Miniko no longer waits on the network before the window opens, and it now remembers a finished download properly. The first launch after this update may finish whatever was left over, and then it's done for good.
Your last change is saved when you close: Hitting Ctrl+Z (or making any edit) and then closing right away could lose that change. Closing now saves first, so your last action always survives.
Miniko is now in Russian: Miniko now has Russian as a language. Pick Русский from the language menu in settings.