API call to clear transcoded media (stf files)

Windows user here: It would be really handy if there were an API call at hand with which the transcoded media files could be manually wiped - or that serviio releases the file lock after transcoding is done and the file is not being streamed.

After a few days, the temporary folder with all the stf-files grows incredibly big.

I already tried restarting the serviio-service every night but for some reason, it takes too long (~2 minutes) to shut down serviio, thus triggering an ugly error.

[zip]

It should delete the file once you start transcoding a new file. Is that not happening? The file will not be deleted if there are other clients still watching it (client being combination of IP and profile)