QTdragon settings disappeared

I am just having monster headache. I finished machining yesterday turned the machine off today I turned it on and all the qt dragon settings are reset to default including probe calibration.
I am running latest Linuxcnc and QtDragon_HD

Check the config folder, usually there are config files that have been copied and extension changed to bak or similar.
But first, why you do not have a zipped and backed up config folder? Takes about 5 seconds. Copy to USB another 2 minutes.
Back on topic, copy the folder somewhere else before changing the extensions and testing, use the text editor to figure out what might be the good config and what not.
And do mind what is changed or moved or renamed.

Hey Tommy I checked config folder. All linuxcnc files are backuped but not the qtdragon.pref
I know idiot I had old backup but I am still tweaking stuff and just did not do it.
Probably good idea if qtdragon create backups by itself for idiots like me.

I could probably add a backup file mechanism in the future.
Strange that it didnt dave properly though.

Are you using master branch or 2.8 branch?

Hi, I am using the latest-ish 2.9.
It just happened again. attached is a log if anyone wants to have a look.

Change the memory, hard drive and/or power supply.
If that keeps happening it is a sure sign one of them is failing, in that order.
Although there is always the possibility of the memory or hard drive controllers to fail, and they are on the mother board.