Serv-u upgrade from v6.4

Hello,

My name is Luc Romain from NP6 companie.

We have a critical serv-u 6.4 running on windows. By some scans i saw security issues so i want to upgrade version to the newest. I know i have to buy license and i will, but i want to be sure that every thing gonna work well.

My users are in a sqlserver database but i saw that fields of columns has changed with the upgrade.

Is there a simple way to upgrade database and all files (like certs and configuration) ? i'm trying with the evaluate version

Thanks in advance,

Luc Romain