Powershell Remove Symbolic Link Windows
Calling Delete() on the corresponding DirectoryInfo object should do the trick:
(Get-Item C:\SPI).Delete()New-Item -ItemType SymbolicLink -Path C:\SPI -Target "C:\Users\Chino\Dropbox (Reserve Membership)\SPI"
If you want to change the target path of the existing symbolic link C:\SPI from "C:\Users\Chino\Dropbox (Reserve Membership)\" to "C:\Users\Chino\Dropbox (Reserve Membership)\SPI\" you do not need to delete the link beforehand. Simply including the -Force parameter to overwrite the link works for me in PowerShell 5.1 on Windows 10 Pro v1603:
New-Item -ItemType SymbolicLink -Path C:\SPI -Target "C:\Users\Chino\Dropbox (Reserve Membership)\SPI" -Force
No way to update the symbolic link as far as I know. Gotta use CMD to remove symbolic link and you could then re-create it using your powershell script. You would do it like this in powershell.
cmd /c "rmdir C:\SPI"