I recently made a mistake with my Linksys E8450 running Openwrt. It was running happily for over 6 months when I decided to perform an image upgrade. Unfortunately I forgot that I was supposed to use the special build - (https://github.com/dangowrt/owrt-ubi-installer) to do this.
I am now stuck at the snapshot r17443-90ee167abaa and unable to save any configuration information.
Anyone know how to recover from this state? Appreciated.
Sounds like you have now just the recovery image, and you need to use it to sysupgrade/flash a normal image.
Alternatively, you had some crash and there are now pstore debug log files, which causes the recovery version to boot. A power-off would clear them. Try power-off.
Ps. Note that you do not need the dangowrt installer after the initial installation. Normal sysupgrade should have been just file.