For anyone having trouble with the EA app who hasn't seen this:
Get Origin back here, and use the linked instructions to prevent re-migration:
Open C:\ProgramData\Origin\local.xml in notepad
Add new key there:
<Setting key="MigrationDisabled" type="1" value="true" />
If you can't find ProgramData, you probably have "Show hidden files, folders and drives" turned off. Either:
Change your folder options in explorer in View -> Options -> View -> Hidden files and folders, or
Open ProgramData directly by using Windows key + R to open the Run prompt, type in %programdata% and press enter.
For DAI, I've seen some people have to restore the settings file that contains the keybinds and DLC listings, because the Origin restoration may overwrite that to show no DLC. So keep a backup of that file! You may also need to add the DAI exe to your firewall.