The Download Centre is only available to trade customers these days and the way the channel list updates are made available will be changing very soon (it's in final testing stages) but right now to get you going here is the latest available update for the Amiko Micro HD SE (should also work on Mini HD SE).
Please just quickly read the following so the update goes according to plan:
There are two files in the attached zip ASTRA-282E-101016-MICROSE_MINISE.abs and LOAD THIS FOR MISMATCH ERROR.abs.
Update by USB and first try loading the file ASTRA-282E-101016-MICROSE_MINISE.abs making sure you choose SW + Bootloader as the update method - If all goes to plan and no error messages then great, the update will complete, the receiver will reboot and when it boots back up your channel list will be in place.
If when loading the above update gives a Bootloader mismatch error then don't panic, nothing to worry about. Simply load the LOAD THIS FOR MISMATCH ERROR.abs first then once that's complete load the ASTRA-282E-101016-MICROSE_MINISE.abs again and this time you should have no error and it will load as normal - Please ensure you choose SW + Bootloader as the update method in all cases, it's important!
Hope this helps get you up and running.