a) signed 2 cat files in \files folder with 2023 biorad certificate
(This may not be absolutely required, as FTDI has there two cat files signed already)

Please note:
- Make sure .cat file are not read-only before issuing the following command
- replace /p ... with actual password below

signtool.exe sign /fd sha256 /a /f "current LSGRD CS.pfx"     /p 6P...7D /tr http://sha256timestamp.ws.symantec.com/sha256/timestamp /td sha256 /v ..\files\*.cat
The following certificate was selected:
    Issued to: Bio-Rad Laboratories, Inc
    Issued by: Symantec Class 3 SHA256 Code Signing CA
    Expires:   Thu Mar 09 16:59:59 2023
    SHA1 hash: 8311FE0202D3634C444BDB2EA696369667725015

Done Adding Additional Store
Successfully signed: ..\files\ftdibus.cat
Successfully signed: ..\files\ftdiport.cat

Number of files successfully Signed: 2
Number of warnings: 0
Number of errors: 0

b) Removed dpinst.xml so driver can be installed in silent mode

Can now run the 64-Bit version:
dpinst-amd64.exe /S /C
where: /S is for silent
       /C reports any errors with is very helpful for troubleshooting problems


See that it installs two FTDI entries under:
Control Panel\All Control Panel Items\Programs and Features




NOTES:
To remove the FTDI driver use CDMuninstallerGUI.exe utility
Start it, 
clear product ID field
Click ADD
click [x] generate uninstall log
then click remove devices


The log will show something like this:
Searching DriverStore
Search concluded after finding no results matching VID_0403 and PID_.
Deleting INF Files
pnputil.exe /f /d oem105.inf298
Successfully removed.pnputil.exe /f /d oem106.inf0
Successfully removed.Done
Searching DriverStore
Search concluded after finding no results matching VID_0403 and PID_.
Deleting INF Files
Done