Please note:
Due to the pandemic, second source flash ICs may be used in your Nextion device.  Where such is the case, a card noting that the need to use Editor version 1.63.3 or higher is required.  These devices have a QR code on the microSD card slot of the Nextion so it can be visually identified.  For such devices, the firmware in v1.63.3 has the ability to communicate with both the existing and new second source flash ICs whereas the older Editor versions do not have the ability to communicate with the new second source flash ICs.  For such devices, the ability to revert to an earlier version of the Nextion Editor is simply not available.  Using an elder *.TFT file will cause a Data Error message and you will need to upgrade your project HMI and compile it with the Editor version v1.63.3 or later.

For Nextion devices not using the new second source flash ICs:

If reverting back to an earlier Nextion Editor version, use your “backup copy” of your HMI file that you backed-up before installing and trying out new software. If you forgot to make a backup (no-no-no tsk-tsk), open the “Version backup folder” and copy your old HMI file from the folder to use (and thank the Nextion Editor that it made a backup before converting into the new Editor version format).

All Editor versions before v0.38 are now prevented from use. Version v0.38 and later versions are more stable and incorporated many more features and capabilities than early Editor versions. Elder versions if truly required can found in the Forum Announcements > Nextion Editors and Change Logs. (Users must register and login to access the Forum)

The LTS Edition (Long Term Support) based on v0.53 is provided for code compatibility for existing projects created with v0.53 and prior.  LTS Edition is not capable of communications with the new second source flash ICs.