Duplicate checkpoints download

[Zueuk]

Describe the bug
My checkpoints are at AceStep/checkpoints
When I opened the UI after an update, it somehow forgot this folder location, so I picked it up manually.
Now it tries to download everything again into AceStep/checkpoints/checkpoints

I also tried to paste the location of .safetensors file, and it trimmed it to the same path AceStep/checkpoints, with the same result.

To Reproduce
Steps to reproduce the behavior:

1. Start the UI
2. Select checkpoints location
3. Press "Initialize service"

[Signalytix]

I have the same issue on a Windows system.

[serdarpolat]

Same here. The "Initialize Service" button creates a new "checkpoints" folder inside the "ACE-Step-1.5\checkpoints" folder and re-downloads the existing models. In "ACE-Step-1.5\checkpoints\checkpoints"...

[cynodesmus]

Yes, one of the latest updates broke the logic for checking and loading models. The project is growing too quickly...
As a temporary measure, I created a symbolic link to the checkpoints inside the checkpoints directory.