More Windows w/o admin
Downloaded the 7z from https://inkscape.org/release/inkscape-1.2.2/windows/64-bit/compressed-7z/dl/
Unzipped it so there is now a folder in:
C:\Users\darren\installs\inkscape-1.2.2_2022-12-09_732a01da63-x64
Now, in my bin folder (which is in my path), make inkscape.bat:
start C:\Users\darren\installs\inkscape-1.2.2_2022-12-09_732a01da63-x64\bin\inkscape %*
And so I can launch it any way I want. All good.