Hello.
Though you might have delected the "init.xml" file, please press on "Root Explorer" again, go to /mnt/sdcard/scan/, and then check if the "init.xml" file is still there.
If you still have this file, please delete it. And move the Maxisys icon into "App Info", and then click "Force stop" to stop progress.
Then please try if you can download the software updates.
After that, if you still cannot download the software updates, please restart the Maxisys and then try it again.