How to install:
1. Copy files from archive to your store.
2. Add Ukrainian language in Admin - Locale - Languages:
Language name: Ukrainian
ISO Code: ua
3. Interface translation pack installed. You can change interface language at Admin - Account - Prefences.
4. Define content translations in admin for categories, products, order status, email templates, product labels, etc...
5. Clear cache in Admin mainpage, Reset cache button at top right.