We've noticed with DraftSight 2019 SP1 the software reinstall's itself on every launch when running within Windows 10. 

What we’ve tried so far

• Granting users full access to all Dessault folders in ProgramData and Program Files
• Granting users full access to the Dessault registry keys
• Installed on a non-domain joined new computer (Straight out of the box)
• Given users full administrator rights to their computer
• Reinstalled using the latest installer available on your website (This was last attempted today)
• Run a repair on the install

Any ideas? From what we’ve seen in the past this is caused by an issue with the installer