Yes it will, you may loose a couple of your flights in the posses but that's unavoidable.
The first file you list is the same one as I linked to at flightsim.com under a slightly different zip name. I believe the one at avsim is AWOL from there library, that's why I linked the flightsim copy.
The second one you list is also well worth downloading, I use it myself for things like adding takeoff airport id's for helicopter flight (one of the things FSX leaves out BTW).
Also use it if you need to delete an entry from your logbook as that's one of the things that can corrupt it if done through FSX itself.