Subject: Bug Report – MX Master 3S Custom Button Assignments Reset After User Switch

Description:
When using Logi Options+ (version 1.90.714605) with the MX Master 3S mouse on Windows 11 Pro, I have customized the button assignments for my user account. However, after another user logs into their account on the same computer and then I switch back to my account, my custom button assignments are reset to default settings or to the settings from the other user account.

Steps to Reproduce:

Log in to Windows with User A.

Open Logi Options+ and customize button assignments for the MX Master 3S.

Log out or switch to User B.

User B logs in and optionally launches Logi Options+.

Switch back to User A.

Logi Options+ shows that the button assignments for User A are reset to default or match the settings from User B.

Expected Behavior:
Button assignments configured by User A should persist and remain isolated to User A’s Windows profile. The customized settings should not reset or be overwritten by User B’s settings.

Actual Behavior:
After switching users, User A’s button assignments are reset to default or are overwritten by User B’s configuration.

Environment:

OS: Windows 11 Pro, Version 24H2, Build 26100.4202
Installed on: ‎23.‎11.‎2024
Windows Feature Experience Pack: 1000.26100.107.0

Logi Options+ version: 1.90.714605

Device: MX Master 3S

Both users are using the same physical machine with different Windows user profiles.

Additional Notes:

The Logi Options+ Service seems to retain configuration across users.

Disabling auto-start for User B does not resolve the issue.

Stopping and restarting the service does not consistently fix the problem.

Creating identical button mappings for both users does not prevent the reset.

Please advise if there is a recommended workaround or if a fix can be implemented in a future release.

Thank you!