My Minecraft versions don't appear in the launcher anymore

Hello,

After a day without opening minecraft, i decided to play a bit. I started the game but because (i think) firefox was opened in the background, my computer froze and i had to restart my pc. When i restarted my laptop, i opened minecraft and discovered that all of my versions were gone. I checked in the Configs if they were here : nothing. So i went to the %appdata% folder, clicked on .minecraft and then versions folder. And i saw that all of my versions folders were still here. I really don't understand what happened because 2 days ago i had 0 issues, everything was in place.
And when i add manually the versions i have to go through the minecraft command introduction everytime, not to mention the fact that my minecraft servers list has been erased/

I hope i'll find an answer here.

Best regards,

Wilantchri.