After updating your OSD to firmware 2.0 or above, you need to keep your config Tool updated. 
This will update your EEPROM for new resources automatically. You just need to connect the board to the new OSD config.
In other words, is mandatory to install the newest “ArduCAM OSD Config Tool” and also update the Character Set. 
A new charset is available on the Config Tool’s install folder. From now on it will be always there as “OSD_Charset.mcm”.