Downgrade 18.42 beta to 18.00

I did try to downgrade to 17.71beta with no luck. Only sensorhub got updated but other files wont start the update proces 

Any sugestions?

The download of 18.42 beta contains the file for Systembackdate 1800, so this should do the job.

May I ask why you want to backdate? I was thinking about installing the beta but hesitated up to now.

In the meantime I installed 18.42 beta and the new Wifi software. I do not see any unusual battery drain. After the update, I charged the watch to 100%, switched it off, waited for 20s and switched it on again. I use only very few 3rd party apps, because they can often cause trouble like battery drain.

I think I found the culprit. I have recently replaced battery in my watch. It is an aftermarket one and it has probably less capacity than stated. I went back to original and battery life is ok. Battery widget shows 100% = 10d. Sorry for desinformation. 

Don't worry. It's absolutely normal in this forum that people blame Garmin/the watch first and don't give the information others would need to help them solve their issues!