I'm not sure what you mean by the router having broken and the "software has leaked." Have you tried using failsafe mode?
https://openwrt.org/toh/tp-link/tl-mr3020
"Failsafe information from the MR3020 device page
Failsafe Mode
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Power on the TL-MR3020
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When the WPS button starts to blink:
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on AA (Attitude Adjustment / 12.09) push the WPS button;
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on BB (Breaking Barrier / trunk) move the sliding switch quickly from one side to the other.
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on CC (Chaos Calmer) ??? not sure try any switches or buttons ??? repeatedly is fine. 12/11/2015: repeatdly pushing the WPS worked.
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Do this until the WPS button starts blinking faster.
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The device is now in Failsafe-Mode
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Connect the TL-MR3020 to your computer via ethernet