Font preview

Hiya, so I used to have the old version of High Logic font creator, the 7.0 and had been using it for years. Decided to get the latest version on another laptop and just did my first font with it. However, the preview thumbnail does not come up as ABG but as the attached image and I know I had the same issue years back but managed to change it somehow. But I cannot figure it out at the moment. Any help would be appreciated.
preview.png

I suspect the font contains a lot of math symbols. By default FontCreator will update the Unicode Character Ranges on export. Uncheck that auto update checkbox, and then export again.

It is a very simplified font and does not have any math symbols. I have deleted them as I always do. I cannot see where that checkbox is though. Attached an image of what I see.
preview 2.png

It is available on the Font Properties panel:
UnicodeCharacterRanges.png

That did the trick. Thank you so much for the help