i just woke up today and downloaded the latest minecraft dungeons update the nether dlc

Ive spent 3 hours playing through all the nether dlc levels

i closed my client and when i reopened it all the progress that i did from the nether dlc levels were reverted back to what it was before the update

each time i relaunch the client it makes me choose a language as if i just installed the game

and when i look at the %HOMEPATH%Saved Games\Mojang Studios*Dungeons*

in my character save files one file turns to a .dat.tmp file instead of a .dat file

UPDATE: 1

I figured out how to fix it for me and why the game is making a .dat.tmp file

norton antivirus is blocking the game from putting the progression .tmp file into your characters file
by excluding the minecraft dungeons file that its blocking

once the file is excluded from nortons antivirus check the file should automaticly go into your characters file ie ur progress will save

UPDATE: 2 i recently had this problem again however not to do with norton antivirus or avg blocking files from compiling together

this time i was logged in by when clicked any key to continue main screen would be blank loading screen  and just loading forever i had my computer on for 48 hours to see if anything would happen suddently but nothing

Fix to the problem this time

close dungeons->open launcher->settings-accounts->click triple dots to remove dungeons account all together->reboot computer->open launcher->sign in with microsoft account->open dungeons

anyways this should help anyone else having this problem

all of these problems only started happening after the nether DLC