WP34s: lost portion of stock library programs

[Lode]

Hello,

Somehow, a portion of the library programs on my WP34s went missing. The following ones are no longer in the list:

TVM, Vec, V.V, V+V, V-V, V<->V, Vun, VxS, VAB, V+-, VLx, VxV

I do not remember deliberately removing those.

I have two questions:

1) Any idea how I could have accidently wiped those programs? So that I can prevent accidently doing this in the future.

2) What is the easiest way to get them back without reflashing? Is it typing them manually from http://sourceforge.net/p/wp34s/code/HEAD/tree/library/? If so, how do I get them in Lib instead of in RAM, and in the same order as they were before?

Thank you!