Hi Dima2:

It appears as if your product was not registered and the product has expired using the trial version or an authorized administrator has turned your user access off.

That's strange because it's supposed to be one time purchase software. I have the serial number and activation codes, and as far as I know, only the payroll is not supposed to work. When I type the all the activation info, it shows successfully activated window. It worked fine since 2015, and only stopped working like yesterday. I'm using sysadmin to login to the company.

Dima2:

Are you able to open the sample company data? If you can then it seems your Sage data file has changed somehow. You may be using another data file rather than your previous one which was working.

I can open the sample database, but I get exactly the same limitation. I also had Sage 2018 subscription installed on that computer, which I did remove, and I believe that somehow that subscription is interfering with Sage 2015 license.  I tried to remove all traces of Sage, and then installing 2015.4, but all the modules are still blocked. Then I installed Sage 2015 on another machine using the same activation and all modules are available, and it works fine. So reinstalling Windows will probably fix the issue, which I really don't want to do.

The issue has been fixed after following those steps.

support.na.sage.com/.../viewContent.do