switch to setup for Arduino Boards Manager

digistump-avr/libraries/DigisparkCDC/examples/CDC_LED/CDC_LED.ino

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+#include <DigiCDC.h>
+void setup() {                
+  // initialize the digital pin as an output.
+  SerialUSB.begin(); 
+  pinMode(1,OUTPUT);
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  
+  //turns led on and off based on sending 0 or 1 from serial terminal
+  if (SerialUSB.available()) {
+    char input = SerialUSB.read();
+    if(input == '0')
+      digitalWrite(1,LOW);
+    else if(input == '1')
+      digitalWrite(1,HIGH);
+      
+  }
+  
+   SerialUSB.delay(100);               // keep usb alive // can alos use SerialUSB.refresh();
+}

digistump-avr/libraries/DigisparkCDC/examples/Echo/Echo.ino

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+#include <DigiCDC.h>
+void setup() {                
+  // initialize the digital pin as an output.
+  SerialUSB.begin(); 
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  
+  if (SerialUSB.available()) {
+    SerialUSB.write(SerialUSB.read());
+  }
+  
+   //SerialUSB.delay(10);
+   /*
+   if you don't call a SerialUSB function (write, print, read, available, etc) 
+   every 10ms or less then you must throw in some SerialUSB.refresh(); 
+   for the USB to keep alive - also replace your delays - ie. delay(100); 
+   with SerialUSB.delays ie. SerialUSB.delay(100);
+   */
+}

digistump-avr/libraries/DigisparkCDC/examples/Print/Print.ino

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+#include <DigiCDC.h>
+void setup() {                
+  // initialize the digital pin as an output.
+  SerialUSB.begin(); 
+  /*
+  remember the SerialUSB starts as soon as you call begin 
+  and doesn't restart the board when you open the serial monitor 
+  (like the uno does) - so if you print to it and you don't 
+  have a serial monitor open that text is lost.
+  */
+}
+
+// the loop routine runs over and over again forever:
+void loop() {
+  
+  SerialUSB.println(F("TEST!")); //wrap your strings in F() to save ram!
+  
+   //SerialUSB.delay(10);
+   /*
+   if you don't call a SerialUSB function (write, print, read, available, etc) 
+   every 10ms or less then you must throw in some SerialUSB.refresh(); 
+   for the USB to keep alive - also replace your delays - ie. delay(100); 
+   with SerialUSB.delays ie. SerialUSB.delay(100);
+   */
+}