You dont say what version you are using, or if you reformatted your HD within the 2488?? Which is what I am assuming you did, so the software should still be the same as what was on there prior to the reformat.
Even swapping out a HD you still have the software remain on the 2488.
The only update for sotfware from Tascam that I can see is for the Mk I.
HTH
Zeek