Technical assistance and updating of Legacy HMI file. Now LTS format / edition.

Hi. I currently have a completed nextion TFT file for a product that we sell. Previously programmed a few years ago. I have been uploading the TFT file via a SD card. Upon the receiving of the latest batch of touch screens, I am unable to upload via the SD card. I get "File Version is too Low" error. I need someone to assist me with this error. I have no idea how to fix this problem. Additionally look at updating the HMI file from a LTS HMI format to the latest Nextion Editor format.

- Deliverables
Assist in clearing the "File Version is too low Error"
Updated HMI and TFT files for 3 different (however very similar) nextion files.