Hi, how I can reset Galaxy Watch Studio with new password, without old password?
Do you mean for the Builds? If you forgot the passwords, you will need to create new Author and Distributor Certificates.
Ron
Samsung Developer Relations
Thanks a lot, Ron 
Yes, I see
am facing same issue please help
Yes, as Ron wrote down this is single option to create Authorand Distributor Certificates if you don’t remember yours password for build watchface in GWD… 
I tried every things - no results…
Just pay attention, you will lose ability to update previously created watchfaces, after creation of new certificates.