What do I need to download "sh" files to a flash drive on my Mac?

Question

I have a new Viking Husqvarna sewing machine 960Q. The software update instructions from Husqvarna are:
Download the update software and unzip it to a USB stick. Save the file at  the root level, do not place the file in any folder.
The updates are in "sh" format and the Husqvara "help desk" said I need a Winzip program. I tried that but found nothing yet that opens an "sh" file. Please don't make me do terminal stuff! There has to be an easy way!

Answer 1

Here's what I get using Text Edit:
%spx%     8Produced with VSM_SD library    ƒ    î
   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _       $.‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _        .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù<   _         .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù-   _         .‡]¿å† .‡N  B@ Ë – X X  † B@ † Ù-
     ]¿ X<     ]¿ X<     ]¿ X<    $]¿ X<     ]¿ X<     ]¿ X<     ]¿ X<     ]¿ X-     ]¿ X-     )}} Ë     ¯ ¯ ¯ ¸ " %   ˘
È Áˇ‰˚ÌÙÙÚ ˜ ¸  
  Ò Á˚Áı˚ Ä1  ÎÄ Ä1  Ä Ä1   Ä Ä1 ˛ Ä Ä1 Ò Ä Ä1 ÛÚÄ Ä1 ¸·Ä Ä1  ËÄ Ä1
ÏÄ Ä1  ˇÄ Ä1   Ä Ä1   Ä Ä1   Ä Ä1 ˇ Ä Ä1 Û Ä Ä1 Ù Ä     ˙ ıˆ
ı ˆ ÙÙ ıˆÚ¸ 0 'ˆˆ Ù Óˆ Ïı ÓÙ Úˆ Ùı
ˆı€  ¸  ˙
¯
˜
ˆ  Ù
Ú    Ó
Ì  Î
Í 
Is this considered the "root file?" I'm not how to copy this directly to my USB stick without a folder as the Husqvarna instructions dictate?