The green version is using PID 0x6010, so you need to change this one as well. Or, make a backup copy of it and rename it something else:

ftdi_vid_pid 0x0403 0x6010

 and add that one:

adapter speed 100

Get back to Cygwin. Run it. Like this:

openocd -f interface/raspberrypi-swd.cfg -f target/rp2040.cfg

The output should look like this:

$ openocd -f tcl/interface/ftdi/ft232h-module-swd.cfg -f tcl/target/rp2040.cfg
Open On-Chip Debugger 0.10.0+dev-g7c96119-dirty (2021-01-25-21:56)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
Info : FTDI SWD mode enabled
adapter speed: 400 kHz

Info : Hardware thread awareness created
Info : Hardware thread awareness created
Info : RP2040 Flash Bank Command
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 400 kHz
Info : SWD DPIDR 0x0bc12477
Info : SWD DLPIDR 0x00000001
Info : SWD DPIDR 0x0bc12477
Info : SWD DLPIDR 0x10000001
Info : rp2040.core0: hardware has 4 breakpoints, 2 watchpoints
Info : rp2040.core1: hardware has 4 breakpoints, 2 watchpoints
Info : starting gdb server for rp2040.core0 on 3333
Info : Listening on port 3333 for gdb connections

It is now waiting for GDB connection. You will have to switch back to the Linux Subsystem to start the GDB-multiarch.

Go to your project build folder (example MyProject/build) and run GDB-multiarch:

gdb-multiarch myProject.elf

 Then when you can log into it, enter this:

target extended-remote localhost:3333

 You will see this:

GNU gdb (Ubuntu 8.1.1-0ubuntu1) 8.1.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...

warning: No executable has been specified and target does not support
determining executable automatically.  Try using the "file" command.
0x10000e98 in ?? ()
Reading symbols from hello.elf...done.
__wfe () at E:\pico-sdk\src\rp2_common\hardware_sync\include/hardware/sync.h:95
95      E:\pico-sdk\src\rp2_common\hardware_sync\include/hardware/sync.h: No such file or directory.
(gdb)

 Load a program, just send "load" and it'll do the magic for you!

(gdb) load
Loading section .boot2, size 0x100 lma 0x10000000
Loading section .text, size 0x7018 lma 0x10000100
Loading section .rodata, size 0x12ac lma 0x10007118
Loading section .binary_info, size 0x20 lma 0x100083c4
Loading section .data, size 0xb04 lma 0x100083e4
Start address 0x10000104, load size 36584
Transfer rate: 13 KB/sec, 6097 bytes/write.
(gdb)

 Send "c" to let it run! You can see the LED blinking! :D

If you are bored with "target remote localhost:3333" everytime you start the GDB, you can create the .gdbinit file inside the build folder:

target extended-remote localhost:3333

 On the Linux Subsystem, just run GDB with these parameters:

gdb-multiarch -iex "set auto-load safe-path /" myProject.elf