It should not normally be needed but if you are stuck then you can restart dbFront using the following steps.
dbFront is implemented as a Web Application that talks to a Windows Service so both parts will need to be restarted in sequence.
Open an Admin Console and run the following commands in order.
%systemroot%\system32\inetsrv\appcmd stop apppool "dbFrontPool"
net stop dbFrontService
net start dbFrontService
%systemroot%\system32\inetsrv\appcmd start apppool "dbFrontPool"
If you encounter any issue that forces you to regularly restart dbFront then please send a support request to [email protected] with the full details so that we can resolve the issue for everyone.