Either save up the $24.99 for the Steam Edition, or download the completely free Legacy Version 0.980 from the official Space Engine website. Do not feed the piracy sites.
Pirated versions lack "Steam Workshop" integration, preventing users from easily downloading community-made ships, textures, and add-ons. 🛠️ Technical Instability space engine steamunlocked
Beyond the personal risk, there is an ethical dimension. Space Engine is not made by a soulless mega-publisher like EA or Ubisoft. It is largely the work of and a small team of volunteers. Either save up the $24