Examples fail to compile

[KrisKasprzak]

I'm using a Teensy 4.0, and an SST25PF040C connected to the SPI bus (chip select pin to)

I tried running readWriteString.ino with no code changes

readWriteString:33: error: no matching function for call to 'SPIFlash::SPIFlash()'
SPIFlash flash;

I changed code to
SPIFlash flash(10); //matches my chip select

compiled and get another error
readWriteString:43: error: 'class SPIFlash' has no member named 'begin'
flash.begin();

I changed code to
flash.begin(1); // nothing will compile

readWriteString: In function 'void setup()':
readWriteString:43: error: 'class SPIFlash' has no member named 'begin'
flash.begin(1);
^
readWriteString:46: error: 'class SPIFlash' has no member named 'getCapacity'
strAddr = random(0, flash.getCapacity());
^
readWriteString:48: error: 'class SPIFlash' has no member named 'writeStr'
flash.writeStr(strAddr, inputString);
^
readWriteString:54: error: 'class SPIFlash' has no member named 'readStr'
if (flash.readStr(strAddr, outputString)) {
^
readWriteString:60: error: 'class SPIFlash' has no member named 'eraseSector'
while (!flash.eraseSector(strAddr));
^
Multiple libraries were found for "SPIFlash.h"
Used: C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\SPIFlash
Not used: C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\SPIFlash-master
'class SPIFlash' has no member named 'begin'

Can you post a working example?