Spyder opens new instances when double-clicking Python scripts

Problem Description

I recently upgraded Spyder to 3.2.8 from 3.2.4. I bind Spyder with any .py files on my Windows 10 computer, i.e., on the right-click menu of a certain .py file, under “open with”, I choose “choose another app”, and choose “C:\Anaconda3\Scripts\spyder.exe” to open .py files (and I check “Always use this app to open .py files” option).

After upgrading to 3.2.8, I found that every time I double-clicked a .py file, a new instance of Spyder opens up, with an empty cmd window pointing to “C:\Anaconda3\Scripts\spyder.exe” also open.

This was not the case for my previous versions of Spyder.

What steps will reproduce the problem?

The steps are described above.

What is the expected output? What do you see instead?

If a Spyder instance is already open, then double-clicking other .py files does not open new Spyder instances. Instead, the .py files should be opened in the current Spyder instance.

Paste Traceback/Error Below (if applicable)

N/A

Package Versions

• Spyder: 3.2.8
• Python: 3.6.3
• Qt: 5.6.2
• PyQt: 5.6.0
• Operating System: Windows 10

Dependencies

N/A

[jakubnyc]

@dalthviz If there is a new version of Spyder, I will try it out and see if the problem has been solved. The latest version I see is 3.2.8 which was not working. I will download 3.2.9 when it is ready and give feedback.

[jakubnyc]

I can confirm that I have repeatedly had troubles with new instances appearing with a number of the recent 3.2* versions. I regularly upgrade Spyder. I update via Anaconda.
Current version with the problem is 3.2.8 Python 3.6.5 |Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 64 bit (AMD64)] Windows 10 Ipython 6.3.0

I did not have the problem with 3.2.6. I just downgraded to that version and the new instance problem is gone via conda install spyder=3.2.6.

The downgrade to 3.2.7 did not work to solve things. Hence you may want to look at the diff between 3.2.6 and later versions.