I think you'll find the information on this post helpful: Adobe Ideas files...
Following is the content from that post.
It's the newer operating system that's causing Ideas to crash.
When iOS 9 first came out two or so years ago, our engineering team came up with a way for people to get the .idea files off their devices and into Adobe Draw. I don't know whether these steps will still work, but it's worth giving them a try:
01 Back up your iPad to your desktop machine using iTunes.
02 Browse to https://www.macroplant.com/iexplorer/tutorials/how-to-browse-backups-on-iphone on your desktop, and follow the directions there to get access to the backed up files. (Downloading and installing the iExplorer app on your desktop is one of the steps.)
03 Export the folder associated with the Ideas app (which should show up as "App - com.adobe.ideas.ipad" in the iExplorer window), so you can access the files through your desktop file browser.
04 In your desktop file browser, navigate to "App - com.adobe.ideas.ipad/Library/Private Documents/documents/sync/files."
05 Take any of the .idea files in that directory that you want to retrieve and upload them to your Creative Cloud account, either through a web browser or through the Adobe Creative Cloud desktop app.
To import the .idea files back into Draw:
01 Launch Draw. Open the settings panel and tap on "Import Ideas Files". Then, tap on the import option desired. You can either import all the .idea files or pick and choose which files to import.