transferring files with spaces in them with putty's pscp

Question

I tried the following to no avail:

pscp -load test username username@domain.tld:"file name.ext" "file name.ext"

pscp -load test username "username@domain.tld:file name.ext" "file name.ext"

pscp -load test username username@domain.tld:"file\ name.ext" "file name.ext"

pscp -load test username "username@domain.tld:file\ name.ext" "file\ name.ext"

pscp -load test username username@domain.tld:"c:\\path\to\\file\ name.ext" "/home/username/file\ name.ext"

pscp -load test username "username@domain.tld:c:\\path\to\\file\ name.ext" "/home/username/file\ name.ext"

Both returned me a More than one remote source not supported error.

Is it just not possible?