The Mach4 screensets are simply renamed zip files and I'm able to unpack them and directly edit the XML (at the moment I'm trying to do a font replacement)
Unfortunately, I can't seem to figure out how to re-zip the file such that Mach4 is happy with it. I've tried taking a screenset, unpacking, and then re-zipping without making any changes and have had no luck. Mach4 responds that there was a problem loading Screenset.  I *think* it uses zip "Deflate" encryption but that's all I've been able to figure out. Any help much appreciated.

A reply to my own: I have found that the 30 day trial of PKzip compresses to a useable Screenset file, but I'd realy rather not pay $30.

Try 7zip?

Good suggestion, but I've already tried Windows zip and 7-zip. 7-zip has multiple compression options and I tried quite a few with no success. Maybe there is a magic setting combination that is evading me, but for now I can only get PKZip compressed screensets to load.

We use just plain ZIP and UNZIP from INFOZIP.  Old school. 

https://sourceforge.net/projects/infozip/files/

Steve

We use just plain ZIP and UNZIP from INFOZIP.  Old school. 

Steve

Thank you! Consider me (old)schooled.

So old school this 76 year old can't figure out how to use it. How do you run this?

It is not a windows program, you must run it from a Command prompt. See the help file which should be attached to this post.

You have to provide all of the files on the command line.  Here is an example of using unzip and zip:

C:\Mach4\Screens> mkdir wxMach
C:\Mach4\Screens> cd wxMach
C:\Mach4\Screens\wxMach> unzip wxMach.set

Archive:  wxMach.set
  inflating: screen.xml
  inflating: images/DRO_Icon.bmp
  inflating: images/ERRe.bmp
  inflating: images/TOOL1.BMP
  inflating: images/TOOL2.BMP
  inflating: images/TOOL3.BMP
  inflating: images/TOOL9.BMP
  inflating: images/TOOLT1.BMP
  inflating: images/TOOLT2.BMP
  inflating: images/TOOLT3.BMP
  inflating: images/TOOLT4.BMP
  inflating: images/TOOLT5.BMP
  inflating: images/TOOLT7.BMP
  inflating: images/TOOLT8.BMP
  inflating: images/TOOLT9.BMP
  inflating: images/Tool10.bmp
  inflating: images/Toolt10.bmp
  inflating: images/X+ Edge Finder Disabled.png
  inflating: images/X+ Edge Finder.png
  inflating: images/background-inputsigs.jpg
  inflating: images/background-lower.jpg
  inflating: images/background-outputsigs.jpg
  inflating: images/background-port1pins.jpg
  inflating: images/background-right.jpg
  inflating: images/background.jpg
  inflating: images/btn-background.jpg
  inflating: images/button-4+.jpg
  inflating: images/button-4-.jpg
  inflating: images/button-large-arrow-down.jpg
  inflating: images/button-large-arrow-left.jpg
  inflating: images/button-large-arrow-up.jpg
  inflating: images/button-large-down.jpg
 extracting: images/button-large-up-g54.png
 extracting: images/button-large-up-g55.png
 extracting: images/button-large-up-g56.png
 extracting: images/button-large-up-g57.png
 extracting: images/button-large-up-g58.png
 extracting: images/button-large-up-g59.png
  inflating: images/button-large-up-savetoff.png
  inflating: images/button-large-up-savewoff.png
  inflating: images/button-large-up-sto.png
  inflating: images/button-large-up.jpg
  inflating: images/button-load.jpg
  inflating: images/button-small-arrow-down.jpg
  inflating: images/button-small-arrow-up.jpg
  inflating: images/button-small-down.jpg
 extracting: images/button-small-led-tcneg.png
 extracting: images/button-small-led-tcpos.png
  inflating: images/button-small-regen.jpg
  inflating: images/button-small-up-atz.png
  inflating: images/button-small-up-gozero.png
 extracting: images/button-small-up-jogmode.png
 extracting: images/button-small-up-jogstep.png
 extracting: images/button-small-up-minus.png
 extracting: images/button-small-up-plus.png
 extracting: images/button-small-up-ref4.png
 extracting: images/button-small-up-refx.png
 extracting: images/button-small-up-refy.png
 extracting: images/button-small-up-refz.png
 extracting: images/button-small-up-reset.png
 extracting: images/button-small-up-spincw.png
  inflating: images/button-small-up.jpg
 extracting: images/button-small-up.png
  inflating: images/button-small-viewmode.jpg
  inflating: images/button-up-closegcode.jpg
  inflating: images/button-up-code.jpg
  inflating: images/button-up-diag.jpg
  inflating: images/button-up-editgcode.jpg
  inflating: images/button-up-hold.jpg
  inflating: images/button-up-home.jpg
  inflating: images/button-up-loadgcode.jpg
  inflating: images/button-up-material.jpg
  inflating: images/button-up-offsets.jpg
  inflating: images/button-up-program.jpg
  inflating: images/button-up-recentfile.jpg
  inflating: images/button-up-reset.jpg
  inflating: images/button-up-reverse.jpg
  inflating: images/button-up-rewind.jpg
  inflating: images/button-up-settings.jpg
  inflating: images/button-up-start-green.jpg
  inflating: images/button-up-start.jpg
  inflating: images/button-up-step.jpg
  inflating: images/button-up-stop-red.jpg
  inflating: images/button-up-stop.jpg
  inflating: images/button-up-toolpath.jpg
  inflating: images/button-x+.jpg
  inflating: images/button-x-.jpg
  inflating: images/button-y+.jpg
  inflating: images/button-y-.jpg
  inflating: images/button-z+.jpg
  inflating: images/button-z-.jpg
  inflating: images/button-zero-4.jpg
  inflating: images/button-zero-x.jpg
  inflating: images/button-zero-y.jpg
  inflating: images/button-zero-z.jpg
  inflating: images/button-zero.jpg
  inflating: images/diag-background.jpg
  inflating: images/dro-background.jpg
  inflating: images/fidia-logo.bmp
  inflating: images/gcode-background.jpg
  inflating: images/gcode-background2.jpg
  inflating: images/led-off-down.jpg
  inflating: images/led-off-up.jpg
  inflating: images/led-on-down.jpg
  inflating: images/led-on-up.jpg
  inflating: images/mpg-background.jpg

C:\Mach4\Screens\wxMach>dir
 Volume in drive C has no label.
 Volume Serial Number is 0474-045E

 Directory of C:\Mach4\Screens\wxMach

07/08/2023  05:08 PM    <DIR>          .
07/08/2023  05:08 PM    <DIR>          ..
07/08/2023  05:08 PM    <DIR>          images
11/12/2020  06:08 PM           418,838 screen.xml
11/12/2020  06:09 PM           297,592 wxMach.set
               2 File(s)        716,430 bytes
               3 Dir(s)  265,903,362,048 bytes free


Now I'm going to zip all of it back up.  The syntax of the command is:
zip <zipfileName> <fileList>

In the example below, we want to zip screen.xml and the images directory with all of its contents.
C:\Mach4\Screens\wxMach>zip wxMach2.set screen.xml images\*.*

Steve

unzip with 7zip, make changes and then copy/paste into the original.set file using 7zip gui