3023a?

[Roland Melkert]

For some reason the 3023 part appears in the drop down modify list but not in my parts panel images or plate list.

I'm not sure as I haven't used MLCad in some time, but you might fix the whole issue by editing 3023.dat (in the parts folder of ldraw).

Change its first line from:
0 ~Moved To 3023b

to something like
0 Plate  1 x  2 (old)

Because I think MLCad excludes 'moved' parts from the main parts palette.

You might need to regenerate parts.lst after as I'm not sure how/if MLCad detects changes.

ps:
The library itself is not going to be 'fixed' as it is not broken, those tools you mentioned need to update their mapping files.