determining path for portable preferences file is wrong for windows OS

[MNSEhub]

processing4/app/utils/src/main/java/processing/utils/Settings.java

Line 102 in 24faa54

private static Optional<File> FindPortableSettings() {

This is currently searching for portable preferences at: <installdir>\Processing.exe\preferences.txt on windows.
guess, should be: <installdir>\preferences.txt

the replaceall should consider \ as path separator on windows.

Cheers
--- mnse