HidehiroKozawa

and I tried to recovered  "launcher_profiles.json" that before deleted

and I modified file "launcher_profiles.json".

in "launcher_profiles.json"

I removed entry below. then I  start launcher normally.

"analyticsFailCount" : 0,
"analyticsToken" : 
"authenticationDatabase" : {
 : {
"accessToken" : ,
"profiles" : {
 : {
"displayName" : 
}
},
"properties" : []
}
},

Sorry.

I tryed to delete "launcher_profiles.json" and "launcher_log.txt" file. then launcher start normally.

This problem are probably related to these files that previously indicated.

I also this crash from today.I don't fix it.

(maybe this issue and recent windows update are related)

on  Windows 10 Home 1903.

same >MinecraftLauncher.exe, version: 1.0.1.0, time stamp: 0x5d888b33

same >Faulting application path: C:\Program Files (x86)\Minecraft Launcher\MinecraftLauncher.exe