Try dropping the font into C:\Xerox\FreeFlow\Core\00000000-0000-0000-0000-000000000000\Data\Fonts. Then select "install for all users". It should show up in the font selctions for nodes such as Watermark. The other concern is the font embeddabilty. This may restrict its use within FFCore.
I have a FFCore Customer installation with a Windows Server 2019 Standard.
The installed FFCore Version was 5.4.3. I updated to the Version 5.4.4.
The customer is using a Font Family named DaxOT. These Fonts are available as a Free Font Family.
I installed the Fonts by selecting the font, right click and then select the Installation function.
After rebooting the server I tried to selct the font, but the DaxOT Font family (in total 12 different Styles) are not visible at all.
However I see the fonts in a fonts list if I use Notepad++ on the system.
I installed the same fonts on my Windows 10 Laptop for testing with Version FFCore 5.4.2 and got no problems at all. The fonts can be accessd from the FFCore Systen without any problems.
I also loaded the fonts into the font directory of FFCore, but did not work either.
Enclosed some screen shots of the font Version, the fonts within the Windows font directory and the list of fonts within FFCore where these fonts do not become listed.
Any Ideas