I put three files on this folder
https://drive.google.com/drive/folders/1RD0VDEJgT9BRc_qxajJaJGHhqh5DQw8H?usp=sharing
tp_recovery.bin_v5 and v6 allow you to upload an image via TFPT, your computer should have the address 192.168.0.66, and hava a TFTP server installed. Rename the file to tp_recovery.bin.
The openwrt file allows you to update to an image with LUCI (v5 only, will post v6 on demand).
Remember that for a v5 I am using a wr840v5 image, build with image builder, excluding some packages so there space left over to make a writable filesystem. The tp_recovery.bin files includes the bootloader (for v5 and v6).
S.