EDDI is already running

### What did you expect EDDI to do?

After opening EDDI and clicking on the 'Frontier API' tab then hitting the 'Log In' button. Then being redirected to my browser and the Frontier Authentication page. I expected to be directed to walk through and 'Approve' EDDI on the authentication page then EDDI would be logged in.

### What did EDDI actually do?

Whenever I hit the approve button on the Frontier Authentication page it notifies the EDDI program but then EDDI itself generates a popup with the title 'EDDI is already running'. The text within the popup is as follows:

`Only one instance of EDDI can run at a time.
Please close the other instance and try again.`

### Steps to reproduce

1. Open EDDI standalone program. (not through Voice Attack)
2. Click the Frontier API tab within EDDI.
3. Click the 'Log In' button on the top right.
4. Follow to the browser which generates a new tab that directs you to the Frontier Authentication page.
5. Continue with with directions in browser to approve EDDI login.
6. Hit the approve button which then generates the error popup as mentioned.

### Investigation notes

I have tried the standard login while keeping the EDDI window open as per usual with no luck. I have also tried closing EDDI after the browser authentication page is generated only to receive the same error once I hit the approve button.

I have made sure through my task manager that there are no other instances of EDDI or Voice Attack running which would cause the 'EDDI is already running' error.

I have even tried changing my default browser from Vivaldi to Firefox to Chrome to Edge. All 4 of them still generate the same error through EDDI.

I tried looking up my specific issue under 'closed issues' here on Github but wasn't able to find it. This may have been addressed in the past but I was not able to find it after a few minutes of searching. I apologize if this has been addressed already.

I have not yet upgraded to Voice Attack 2 or EDDI 5.+ yet. I am still running EDDI v4.1.9 which has worked perfectly fine in the past for at least 6 months. I took a break from ED and just tried to get back on it last night and this is my current situation.

### Operating system

Windows 11

### EDDI version

4.1.9

### VoiceAttack usage

VoiceAttack 1

### VoiceAttack version

1.16 (x64)

### Problem area

- [x] Installer / startup
- [ ] Speech synthesis
- [ ] VoiceAttack integration
- [ ] Variables / scripts
- [ ] Event
- [ ] External connections (Frontier API, Spansh, EDSM, etc.)
- [x] User interface
- [ ] Localization / languages
- [ ] Crash / exception

### EDDI / operating system language

English (United States)

### Voice

Microsoft Zira

### Confirmation

- [x] I have provided the full EDDI version number, not just "latest" or "current."
- [x] I have checked for existing related issues.