all my profiles are gone

ok so i was in my luncher, have forge 1.8.9 + 2 mods and wanted to have a custom icon of LabyMod execpt i cant find it anywere so i just got in the luncher_profiles.json and edited it with NotePad ++  so i copier the icon "name" of LabyMod and put it into my forge 1.8.9 icon thing (i putted leaves randomly and replaced it with data/.... from my LabyMod profile) then i saved the luncher_profiles.json and when i lunched the luncher it "updated" and asked for my passsword and email again so i login and all of my profiles are gones so i try to put the copy that i have with all my profiles but when i do it "update" and ask me for my email and password and just reset the luncher.... help please i had "lots" of profiles and i dont wanna do it all again