The question was answered in the thread above, but in case you found it confusing as it was spread over several posts, here are the steps altogether.
You can use a general exclusion from any zwave controller, it doesn’t have to be the one that the devices are actually paired to. Indeed, that’s the point of the general exclusion. The people who made Zwave realized that a controller might go bad, or you might have bought a used device, or even a device that is new but was paired to a test network at the factory and not properly excluded.
So whatever your new zwave controller is can issue the general exclude command. Even a minimote can do so. The controller issuing the general exclude does not have to be on the same network as a device to be excluded. It just issues a general exclude command to any zwave device within range. Then you physically do something on the device that you want to exclude, and it will accept the general exclusion.
As far as how you get the Mimolite to accept the exclude, that information is in the Mimolite manual on the manufacturer site:
EXCLUSION from (removing from) a network: 1) Set up the exclusion mode at the controller (for detailed directions, please refer to your controller user manual); 2) Press the MIMOlite button and the controller will indicate the unit has been removed from the network. The Status LED will blink when the exclusion completes.
Then include it as usual:
INCLUSION in (adding to) a network: 1) Set up the inclusion mode at the controller (for detailed directions, please refer to your controller user manual); 2) If the LED has a periodic single blink, the unit will be automatically included. Otherwise, the button has been previously pressed and automatic inclusion mode is no longer active. In this case, briefly press the button once and the controller will indicate that the unit has been included in the network. Also, the Status LED will blink when the inclusion completes. Inclusion and exclusion are always done at normal transmit power mode.
If you are asking how can you reset it if you don’t have any controller, not even a minimote, the answer is that you can’t. Once a zwave device has been paired to a controller, it requires another controller command to remove the network information.