You can switch the profile from studiox to studio. click on the home button which is top left of the in the studiox then the view will be as mentioned below. click on setting and then click on license and profile and then click on change profile and then select the studio.
your license have been expired as you have enabled the enterprise edition your license have expired because the enterprise edition will be there for 2months only. So, if you can see over there it shows free beside subscription tag
You have the free plan licence so please register with UiPath again with existing account but with new organisation name so that it will give u a community licence with which you can access the studio.
if you wanted to again use the studio then logout from orchestrator assistant and studio. Then try to register for UiPath community version again with same Mail ID but with different organization so that you can use the studio again but no assests or else processes nothing will be visibled it will be like a new orchestrator again.
If you have a Community license, it is a free plan that gives you instant access to elementary automation capabilities through licenses for users and UiPath services.
It is aimed at non-commercial use only. For commercial purposes, the Free plan is available.
This plan includes a set number of licenses, of which you cannot request any more. If you need additional licenses, you must upgrade to the Pro plan.
If you will check About licensing , you will see that you will get 2 Automation Developer - Named User licenses.