With Filestar you can easily convert CUR to ICO. Accessible directly in your right click menu for single or batch CUR processing. How to convert CUR to ICO:
1. Download and install the latest version of Filestar. (https://filestar.com)
2. Right click on one or more CUR file(s) on your desktop and select Convert with Filestar.
Type "convert ico" in the search box.
3. Press Run.