The plugin security would be improved by using SQL prepared statements, for example in file downloading requests, in addition to the basic sanitising of the request data.
Note that the plugin’s Download Options will be need to set with locations for files suitable to the infrastructure where it is being implemented.
Reason for the 'Use with caution' result
The plugin has been given this recommendation at the tester's discretion:
The plugin development may be discontinued (at date of this inspection, it is last updated 1 year ago and hasn’t been tested with the latest 3 major releases of WordPress.