Does not correctly update a revised model on an iPad 2

Despite repeated attempts to open a revised eDrawing on my iPad 2, the app will only open a previous eDrawing version that no longer exists anywhere. Same eDrawing model will open correctly on my iPhone 4s. I have uninstalled and reinstalled, but app will not show the latest eDrawing on my iPad. App needs work. iOS up to date on both devices. Using Dropbox to hold files.

jsp1946 about eDrawings