Hello!
How you need to uninstall it properly because my forum is full of bug
Delete all the files and delete the Database.
Download the latest dev release and the run uninstall proccess.
Then all goes to be fine if you wanna install again or otherwise only delete thx_dateofuninstall db table and it's done...
Go to admin cp templates and styles
select postbit templates
potbit and postbit_classic
remove some <br /> tags, there are some duplicated entries and it's done !!!
Thank you very much, problem solved