You should use rather the enterprise scale license in this case. It lets you to scale into infinity of servers with single license key without worrying how many instances you actual have running.
The standard jsreport configuration uses file system based templates store and you should not lose your data after jsreport restart. Do you use jsreport installed from npm or downloaded executable file? Maybe you use the downloaded executable in which case you should call jsreport configure command at the beginning which helps you to create the correct configuration.