Upgrading to the -FDB calibration level will not gain anything. If you are looking for Calm Screen, you will need to use the H*** calibration and strategy files.
APIM Firmware Production Releases - Ford / Information - CyanLabs Official Community
3.0 APIM NAV & NON-NAV Unit Firmware (Production Release, 2017-Pre-2018.5, H-Early J Series)
(Originally Found On 2017/Early 2018 Units That Ship with 2 USB Ports on Back)
GB5T-14G376-AA
HB5T-14G374-CA
HB5T-14G375-DA or HB5T-14G375-FA (HB5T-14G375-CA NON-NAV)
GB5T-14G379-AA
HB5T-14G379-BA
As far as logo files, these are contained in the Sync software or (for EU only) the Logo software file, 1U5T-14G658-AG.
The APIM you referred to, H1BT-14G371-FEC, in itself does not have flickering issues, it is the vehicle platform it is installed in that causes the issue. This would be the case with any APIM. If you placed a newer APIM in place of one that has the flickering issue, the new one would exhibit the same behavior, given the same asbuilt settings.