Sage 100

I have a client who is on a unix server using a very old version of Mas90 (I believe 3.xx) What's the best way to migrate to a windows OS using Sage 100 ERP 2015? Is there a utility that I can use which will convert those files?

We recently switched from MAS 90 to Sage 100 ERP and we did it over the weekend and when I came back on Monday everything had seemed to go smoothly but now I am getting reports of user not being authorized to open a couple of the modules. No one is authorized…