Please see generic instructions below. 
In order to restart connector after rebooting server you need:
1.       Login to Sage server as accounting.
2.       Open folder PeachtreeREST 2016 on desktop.
3.       Right click on PeachtreeImportExport.exe and select Run As Administrator
4.       Sage 50 should not be started!
5.       On different computer open  and click on Customer Login link (right top corner)
6.       Put login credentials – Username customername@youremail  Password password
7.       Click on the flow PTCust2SFAccountIRS.
8.       Enter parameters – StartId aaaa EndId aaaa BatchSize 1 and click Submit in the lower frame
9.        Click on Single Run radio button for that flow, check Start checkbox and click Submit
10.   Return back to Sage Server and you should see Sage 50 started and credentials box opened. Enter password for interweave user (Interweave15)
11.   Go back to the browser and logout from flows.