My DBA is wondering if we could just deattached the dabase files from the current server and attached them to the new server, and after that recreate the users?
Yes, no problem. (but take a backup for safety)
Where are lansweeperservice.exe.conf and web.config located?
%programfiles%\lansweeper\service\lansweeperservice.exe.config
%programfiles%\lansweeper\website\web.config