Enable Steam Console
Press the Windows Key + R, type steam://open/console, and click "ok"

Download Old Version
Type the following command and hit enter to download
download_depot 1810820 1810821 2568490693077191598

Replace Game Files
1. Navigate to where your steam downloads are, it will likely be: C:\Program Files (x86)\Steam\steamapps\content
2. Find the folder with the game files you are looking for
3. Right click the game in your steam library and select Manage > Browse Local Files
4. Delete all of the game's files and replace them with the ones from the depot you downloaded

1. Download eo3_font_fix.zip at https://gamebanana.com/mods/447653

2. Unzip and plop it at C:\Program Files (x86)\Steam\steamapps\common\EO3HD


That is all. Credits to SoggieWafflz for coming up with the mod.