Back in 2017 a Windows 10 update changed how many plugins using static linked runtime could run at once (64, I think). In response Juce changed the default behaviour to “use DLL runtime”.
However there was a big uproar to Microsoft’s change, and they back pedalled and increased the FLS slot limit to something like 4000, so it is no longer a problem to use the “statically linked runtime” setting like you have done.
In time, as people upgrade to Windows 10, it will be safe to build plugins that use dynamically linked runtime, but if your plugin needs to support Win 8 or earlier then “statically linked runtime” is the appropriate setting IMO.
You can follow the original announcement and back pedal in this thread.