"Unsupported File Format," while trying to Import my MCWorld, don't want to lose it- please help!

Hello, my name is Isabel, and I very much enjoy playing Minecraft, though there was an Issue, that causes me worry. At first I've been playing on Minecraft Education Edition because I couldn't afford the real Mincraft- I've been working on a whole world, with much building for months! Just this morning, I was able to buy the real Minecraft for my PC, and bought the Minecraft Windows 10 Starter Edition. Hoping I could import my world from Minecraft Edu, to Minecraft Windows 10, I exported my world from Minecraft Edu, and attempted to transfer it to Minecraft Windows 10, by using the Import button, however, a note popped up, saying "Level Import Failed; Unsupported File Format." Hoping this was just a mistake, I tried looking at articles, they said I would have to reset my computer, so I did, I updated it, restarted it, and hoped for the best, however, I still came across the same problem. I could not find a solution through articles, Videos, or similar problem/solution feedback- so I was hoping, if I contected you guys directly, you'd help me import my world, and or, tell me why I can't? I'm really hoping to import my world soon, because once I graduate High School, my School email will be deleted, and I will lose the world I've spent months working on. Please help! Thank you for your time.