1 extension is related to backup or internet files. You have chance to open 1 files with Pro-Enginner software.

There are two different areas that use 1 extension: 

1. It may be a backup file which saved by Proenginner . Software backs up automatically and gives the file extension name with numbers such as 1,2,3.. 

2. It may be a splitted file which used for downloading files via internet. This file doesn`t work by itself there should be sequential files with it like .1 , .2 , .3 form.

Splitted files can be collated by HJsplit. After installing Hj Split, pick the first file from the input section then click on the Join button.

What to use 1


which page related to 1 file


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