modules won't open

I have been successfully playing Vassal’s Wilderness War on my Mac. I recently download an update to Adobe which says it is version 2015.016.20039.
When I tried to download Twilight Struggle I kept getting a message that reads, " Adobe Acrobat Reader DC could not open Twilight Struggle because it is either not a supported file type or because the file has been damaged." I tried several other modules as well with no luck. I have tried deleting and reinstalling Vassal and all I accomplished was losing the Wilderness War that was working.
I have tried downloading it on Safari and Firefox. I also re-downloaded Adobe and restarted my computer. No luck.

Model: imac
Processor:3.2 GHz Intel core i5
OS: OS X Yosemite 10.10.4
Memory: 8 GB 1600 MHZ DDR
Graphics: NVIDIA GeForce GT 755M 1024 MB
Vassal: 3.2.16 macosx
java for imac Version 8 Update 91
Module: Twilight Struggle but tried several others that also didn’t work

Thus spake lcdanchik via messages:

I have been successfully playing Vassal’s Wilderness War on my Mac. I
recently download an update to Adobe which says it is version
2015.016.20039.
When I tried to download Twilight Struggle I kept getting a message
that reads, " Adobe Acrobat Reader DC could not open Twilight Struggle
because it is either not a supported file type or because the file has
been damaged." I tried several other modules as well with no luck. I
have tried deleting and reinstalling Vassal and all I accomplished was
losing the Wilderness War that was working.
I have tried downloading it on Safari and Firefox. I also re-downloaded
Adobe and restarted my computer. No luck.

Why are you trying to open modules with Acrobat Reader? That can’t
possibly work.


J.

Someone else downloaded my first module for me and I misunderstood how it was done. I finally figured out what I was doing wrong. I’m sorry I wasted your time but appreciated your answering.