alignment fields of mod_sr_checkavailability

Hello , I posted on the site in the form to check room availability " mod_sr_checkavailability " ; I wish I could better align the fields to select the number of rooms and number of adults and children . Unfortunately I can not solve ? you can tell me the file where to intervene ? Another question , I currently have installed the free version to test the basic functionality , however I would acqiustare version "single " ; Will I be able to upgrade the current version , or I'll have to uninstall the free to install the other ?

Thank you in advance.