Hello,
My Duplicati ‘v.2.1.0.120_canary_2025-06-24-win-x64-gui’ works well
but it regularly opens a new UI in a new tab in my Chrome browser, that’s annoying.
Why? And what’s the fix?
Hi @Valp, welcome to the forum 
That is not something I have heard of before. Do you see any other symptoms?
I could imagine that maybe crashing Duplicati will make it restart the server, and this could perhaps trigger a new UI opening.
If something is writing files into the lock_v2 folder, this can also trigger a new UI.
If you start Duplicati and it notices that another instance is running, it will trigger opening the browser UI again. The logic being that you click on Duplicati in the start menu, but it is already running, and here it seems to make sense to open the UI.
Could it be that you have something that is starting Duplicati again?
Hi,
I suppose no to all.
I don’t see anything that is starting Duplicati again.
Nothing writte in the lock_v2 folder but the lock_v2 file.
Why should Duplicaty crash ? How I could be aware of it ?
I see no other symptom.
The story is I had used Duplicaty for long and suddently about six months ago that annoying problem appeared. I tried to reinstall Duplicaty, I even had my whole Windows system recovered via ACRONIS, but it’s the same.
I am very sorry to be on the verge to find another bakup solution, so please HELP…
Hi @Valp
The lead dev knows the code, but I can try to collect some more information on the issue.
What’s your current version? By the way, Canary are test releases with more bug risk.
Since you’ve been seeing this for months, please elaborate on what “regularly” means.
Is that on PC boot, wake from sleep, login, random without touching anything, or what?
Is this a single-user PC with Duplicati installed by the GUI installer, and TrayIcon used?
Default in the installer (which can be changed) is to start Duplicati at login (not at boot).
There are also a Desktop icon and Start menu entry. Which way do you use and when?
Is Duplicati left up all the time, or Windows service, or started for backup then stopped?
Start/stop is inconvenient if job is scheduled. Is there a schedule, or is backup manual?
Stop when not in use would presumably be a certain block on annoyance during chase.
Is that an image backup? If so, “the same” (with all the old config) is the intent, correct?
I’m looking at “whole Windows system” and taking it to infer an image – with everything.
It’s been awhile, but do you know any changes then? You want reasons. Give us clues.
Do you know how to use Task Manager? One clue to spot a Duplicati restart is to see if PID changes. For a better view, Sysinternals Process Explorer can show the start time.
While in there, you might as well also look for unexpected Duplicati. Is it just one named Duplicati.GUI.TrayIcon.exe? When browser opens, is it using port 8200, not higher?
Instead of Process Explorer, you could probably notice restarts by the lock_v2 file date.
Most people might not know where to look, but you already do. You can watch its date.
I don’t think Duplicati opens a new UI at any other time without some other user action.
Developer might correct me if I’m wrong. I assume there’s no automation clicking icons.
Looking in Task Manager would still be good to check what Duplicati things are running.
Multiple Duplicati on different ports (look at browser URL) can become very confusing…
Regarding Duplicati versions, going back to 2.1.0.5_stable_2025-03-04 might require a downgrade of database. There’s a tool, but you can consider 2.1.2.0_beta_2025-08-20.
Going forward upgrades the database automatically as needed, so is an easier change.