I heard someone mention “Ctrl + R”. What does that mean?

No need to worry about it!

Pressing “Ctrl + R” while the iRacing sim is open will refresh all the vehicle and driver textures based on what data is available on your system for iRacing to display.

Under normal operation of Trading Paints Downloader, is not necessary to press “Ctrl + R” as Trading Paints will refresh individual cars when they’ve downloaded rather than the entire field, which is unnecessary and takes a long time to update.

The only time “Ctrl + R” might apply is for painters who are reloading their work-in-progress paints when working in their iRacing paint folder, separately from Trading Paints.