2 basic questions from a dabbler

General Discussion
1

As the title implies, I am by no means a serious Vassal user, instead using it to the best of my knowledge to help playtest my prototypes.

I created cards using a Deck and Cards in it (No kidding, right?) For each card, in the Properties of the Basic Piece trait, I used a PNG file and it worked all right. Now, I had to edit every PNG file to add some symbols to them, is there a way to “update” the Cards without having to open every single one of them and re-selecting the PNG file?

And my second question is about the main board (Indeed a Main Map/Map Board object). I again used a PNG file but had the apparently-not-so-brilliant idea of changing the file name (BoardV2, BoardV3, etc.). The file being close to 2 megabytes, I noticed that the module still loads the previous files even though they are nowhere to be found in the module. The net result is that my vmod file got unnecessarily large. Is there a way to somewhat clear this cache?

Thanks!

2

Thus spake Marcon:

And my second question is about the main board (Indeed a Main Map/Map
Board object). I again used a PNG file but had the
apparently-not-so-brilliant idea of changing the file name (BoardV2,
BoardV3, etc.). The file being close to 2 megabytes, I noticed that the
module still loads the previous files even though they are nowhere to be
found in the module. The net result is that my vmod file got
unnecessarily large. Is there a way to somewhat clear this cache?

Modules are ZIP archives. You can remove unused images from them using
any program which manipulates ZIP archives. (E.g., 7zip.)

J.