Sounds like something is wrong with the license. Are you sure it is correctly named? Windows likes to not display known types, so it might show WizLic without the .dat I saw that once, so I added the .dat, but now the real file name becomes WizLic.dat.dat
If you donyt have a backup of your license file on another machine, then contact support@machsupport.com, they should be able to replace the license.