Plan files change to PDF extension without telling them to....

[Ikedcr 2]

For years I have copied Chief files to a USB flash drive and transferred them to a laptop with zero issues.  The last week when I copy chief .plan files to the flash my laptop sees them as .pdf extensions NOT .plan files. This occurs if I read them directly from the flash drive or copy them to the laptop.  Take the flash out of the laptop, put it back in the desktop and .plan files look and open normally. Only .plan files do this, layout files and any other type file read fine.  Using X7, Win10 on both computers. 

 

This is not limited to the flash drive, if I email the plan, download it from OneDrive, etc, it does the same thing. 

 

I attached screenshots, one from laptop showing the flash drive with the odd PDF extensions, the other from desktop from the same flash drive. 

 

Anyone have a thought on what causes this?  Thanks. 

 

 

[Kiwideziner 35]

Never seen this before but assume a Win 10 issue. check what your default progaramm exts are set to in win10. or some name like that.

[justmejerry 45]

Not 100% positive but I think if you change the default program in windows it would change that. 

[Ikedcr 2]

Bingo!  That was it.  I have no idea how that changed.....but my buddy the IT guy always says...." Your computer did exactly what you told it to do".

 

Thanks!!!