Yup, the recovery method is identical, whether you are using the installed SEE client or the Removable Access Utility.
All you need is to have the Master Recovery Certificate (i.e. the one with the private key) in the currently logged on user's personal certificate store. In this case, it should be that of your admin user. The SEE-RME Client automatically looks for certs when opening encrypted files, and should just find it. This is just like how the Removable Access Utility behaves, and also how the SEE-RME client behaves when user certs are available.
In summary, the Admin would:
- Receive encrypted file, and put it onto a USB stick via a machine that does not have SEE-RME
- Install Master Recovery cert to machine with SEE-RME installed (i.e. Recovery Machine)
- Plug USB into machine with SEE-RME installed
- Open/Recover file, and save decrypted copy
- Remove Master Recovery Cert from Recovery Machine
Remember, it is best practice to securely store, and audit access to, the Master Recovery Certificate.