Any version of firmware can be uploaded to your printer as long as it is compatible with your printer's model and the version of PreForm you have installed on your computer. To revert back to an older version of firmware:

1. Check your printer's model type.
2. Check the version of PreForm you currently have installed by clicking Help > About PreForm from the menu bar.
3. Select your printer's model from the list in the article Firmware release notes. PreForm compatibility is noted in the "What's New" section when relevant to the release.
4. Download the firmware version that is compatible with your printer and version of PreForm you have installed.
5. Update the printer using the recently downloaded firmware.