adobe acrobat reader is crashing on ipad

Since late August, acrobat isn't able to open large files on my ipad. It used to work perfectly before. I have tried all methods from software updates, reinstallations, workarounds, but it hasn't worked. The app crashed after 2 seconds of trying to open any files even around the size of 500 MB. I have been raising the issue on the review section on app store but they literally pasted a nonsensical response from 1 year back saying they have solved the issue. I am astounded how they treat consumers. I have been using other apps. Repeated updates have not solved the issue, and my review updates have received no response. It is a very bad experience now.

[Moved to Acrobat Reader Mobile by a moderator］