We have also run into this same issue with fiblueprint.xml permissions being modified by the program/system somehow and breaking bank feeds for others in a multi-user environment. We are currently testing the following to fix this:

- Remove inheritance of permissions on fiblueprint.xml and remove all permissions

- Set ownership to your administrator account of choice

- Set Administrators to Full Control

- Set Authenticated Users to Modify

- Confirm only these two permissions exist in the permissions, and that you are the owner. Additionally we set Modify (NOT full control as recommended by Intuit) permissions to Authenticated users on the following folders in multi-user environment: 

1. C:\ProgramData\Intuit
2. C:\ProgramData\Common Files\Intuit
3. C:\Program Files\Intuit
4. C:\Program Files\Common Files\Intuit (if exists)
5. C:\Program Files (x86)\Intuit
6. C:\Program Files (x86)\Common Files\Intuit