The memory.dmp has nothing to do with regeneration, it is just used by techs to try and find why a system crashed, it is a redundant file. It isn't like system restore which can step to a restore point or a last known good setup, etc. memory is cleared on boot anyway and you can't reload this file back into memory.
This is a dead parrot, deceased, shuffled of its mortal coil, gone to meet his maker, this file is no more, useless, without worth, you can safely delete it.