XF 2.0 how to force everyone back to a certain theme?

[surfsup]

How do I force everyone back to a certain theme?

 

[Mr Lucky]

Just disable the other ones.

 

[Jake B.]

Easiest way (if you don't want to permanently disable the others) would be to set it as your default style in the adminCP then run the query:

update xf_user set style_id=0;