What happened to my groups?!

[Amethyst Jetaime]

Did you try to relog again?  If so, that should have fixed it unless your viewer was damaged in the crash. 

If you still don't see your things right, do a clean re-install of your viewer. Here is how to do that https://community.secondlife.com/t5/English-Knowledge-Base/How-to-uninstall-and-reinstall-Second-Life/ta-p/1375231

The link provided is for the official SL viewer, but also works for third party viewers. You viewer name will be substituted for the SL viewer name.

[Amethyst Jetaime]

Did you try to relog again?  If so, that should have fixed it unless your viewer was damaged in the crash. 

If you still don't see your things right, do a clean re-install of your viewer. Here is how to do that https://community.secondlife.com/t5/English-Knowledge-Base/How-to-uninstall-and-reinstall-Second-Life/ta-p/1375231

The link provided is for the official SL viewer, but also works for third party viewers. You viewer name will be substituted for the SL viewer name.

[ZetaRESP]

It's okay, it was a connection issue, I already fixed it.