Opening the creo files from the Explorer

Because of the way Creo saves versioned files, you will need to set the default app for each version extension (.1, .2, .3, .4, .5, .6, ,7, .8 .9 .10...).

Windows settings > Apps > Default apps > Choose defaults by file type (at bottom) and select the default for each version extension.

I think you could try this method.

1. Associate all files ending with .drw.n, .prt.n, .asm.n (with n being integer from 1 to 999) with a new file type. You can call it anything, but for simplicity, let's call it Creo Pro Versioned File
2. Change Windows setting to open that new file type with Creo View by default.

To associate .drw.n, .prt.n, and .asm.n file extensions (where n is an integer from 1 to 999) with "Creo Pro Versioned File," you can use bat script script. 
I haven't done it myself, the below text is from ChatGPT, so you can try but with caution.

for /L %n in (1,1,999) do (
 assoc.drw.%n=Creo Pro Versioned File
 assoc.prt.%n=Creo Pro Versioned File
 assoc.asm.%n=Creo Pro Versioned File
)

Explanation:

1. for /L %n in (1,1,999)

   • The loop runs from 1 to 999, incrementing n by 1 in each iteration.

2. Commands inside ()

   • For each value of %n, the following associations are created:
     • .drw.n (e.g., .drw.1, .drw.2) with "Creo Pro Versioned File".
     • .prt.n (e.g., .prt.1, .prt.2) with "Creo Pro Versioned File".
     • .asm.n (e.g., .asm.1, .asm.2) with "Creo Pro Versioned File".

Running the Command in a Script:

• If you're running this in a batch script (.bat or .cmd), use %%n instead of %n:

for /L %%n in (1,1,999) do (
 assoc.drw.%%n=Creo Pro Versioned File
 assoc.prt.%%n=Creo Pro Versioned File
 assoc.asm.%%n=Creo Pro Versioned File
)

Note:

• These commands modify the file association database. Test the command in a controlled environment if you're uncertain about the impact.
• To revert changes, you can reset the associations individually:

assoc .drw.<n>=
assoc .prt.<n>=
assoc .asm.<n>=