It is useless now

I have purchased it a few years ago and it has been working anyhow till this update. After upgrading the app yesterday, it doesn’t download and it takes forever. In my case, I have kept my macbook pro 15 on the whole night and its download progress didn’t move a pixel forward. Why we can’t simply download it from the app store with all of its data?

Naeem chak about Oxford Advanced Learner’s Dict, v8.7.21