Hi Victor,
Thank you for your updates and patience. I looked into this a bit further, and I hope I have come up with a solution. Start with a fresh download of the firmware updater folder and install this driver from FTDI. Link below
https://relatedcontentdemo.kinsta.cloud/sigdownloads/Spike/CDM%20v2.12.00%20WHQL%20Certified.exe
The ftd2xx.dll/bb_api.dll you dropped in are likely 64-bit versions. The FTDI driver install will be necessary for using the TG44/TG124 and will install the 32 and 64-bit versions. I think this is the missing piece. The firmware updater is a 32-bit application and installing the FTDI drivers hopefully will install the last missing DLL.
Let me know if this works.
Regards,
A.J.