Steam Quick Switch v1.0.2
Win10 / Win7 / Win8
You can set one Manager Password to lock down the app. From there, you just need to go to Manage to link your accounts to the app.
Accounts will then be shown on the Home tab. You just need to click on any to switch. Easy peasy!
steam quick switch sqs
1License and operating system information is based on latest version of the software.