I have tried,
- reinstall (like expert said here)
- Re-download and install
but the result is same, An error popups "Draftsight has stopped working"
Problem Event Name: APPCRASH
Application Name: DraftSight.exe
Application Version: 188.8.131.5250
Application Timestamp: 59d74618
Fault Module Name: ig4icd64.dll
Fault Module Version: 184.108.40.2066
Fault Module Timestamp: 4b8006e0
Exception Code: c0000005
Exception Offset: 000000000066f0a3
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 1033
Additional Information 1: 1d5a
Additional Information 2: 1d5a4ed030ebf1593b124b4b23c05da3
Additional Information 3: a9da
Additional Information 4: a9da1df576c40c693c6d4b89465a5dc5
DS said, DraftSight 2018 supports windows 7 sp1 here
but there no support for windows 7 users here, they didn't provide guide for windows 7.
Currently I'm working with SolidWorks 2014 and Alias Studio without having any trouble.
Is there anyone, Who can tell me what should I do?