Why after I updated then rollbacked, I do not see the original version of my web xstudio?

The Java cache is the cause and you need to clear the cache: Windows start menu > Control Panel > Programs > Java > General > Temporary Internet Files > View...
Select "Applications" in the "Show" drop-down menu, select all the XStudio instances, delete them
Select "Resources"in the "Show" drop-down menu, select everything and delete
Restart XStudio normally...