Only use this Flasher cleaner firmware into your STC6000 if it is behaving strangely/incorrectly or you are suffering from blocked plugin's(unable to delete or overwrite).
This flash cleaner is for STC6000 with V6.00 bootloader(can be seen on the front display when booting up)
Ideally you should load this firmware via serial port using porter express but it can be loaded from USB.
Once you have transfered the flash cleaner firmware carry out a "system restore to factory default" then load the latest firmware.
Don't forget to back up your settings using the "store system data" option before carrying out the factory reset.