The downloading, archiving, backing up of programs needs to be done while the program subscription is active....as what's 'installed' on your machine is an install with updates, etc., and not an InstallER.
As my subscription expires some-when around 2020 I haven't hit this problem, nor needed to archive for re-install.
Probably your best plan of attack is to do whatever OS install you are wishing to....and then re-subscribe to OD and all will be easy...