Just dowloaded and installed v1.8.13. (Replaced v1.8.3 + tried to follow istructions re: copying existing files)
Tried to verify/compile an older ('LCD_I2C_Test.ino') example with it - failed.
Tried to verify/compile the same example with v1.8.2 - succeeded.
I had no problem with v1.8.3 before either.
Not sure why v1.8.13 is trying to use an ST library.
Specified target is Arduino Uno
File is 'LCD_I2C_Test.ino'
Compiler messages :-
(Sorry it is long)
=====================<Using v1.8.2 to verify/compile>=============================
E:\Development\ArduinoAT\Arduino\arduino-builder -dump-prefs -logger=machine -hardware E:\Development\ArduinoAT\Arduino\hardware -hardware C:\Users\Philip\AppData\Local\Arduino15\packages -tools E:\Development\ArduinoAT\Arduino\tools-builder -tools E:\Development\ArduinoAT\Arduino\hardware\tools\avr -tools C:\Users\Philip\AppData\Local\Arduino15\packages -built-in-libraries E:\Development\ArduinoAT\Arduino\libraries -libraries E:\Development\ArduinoData\libraries -fqbn=arduino:avr:uno -ide-version=10802 -build-path C:\Users\Philip\AppData\Local\Temp\arduino_build_309245 -warnings=none -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avr-gcc.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.arduinoOTA.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -verbose E:\Development\ArduinoData\LCD_I2C_Test\LCD_I2C_Test.ino
E:\Development\ArduinoAT\Arduino\arduino-builder -compile -logger=machine -hardware E:\Development\ArduinoAT\Arduino\hardware -hardware C:\Users\Philip\AppData\Local\Arduino15\packages -tools E:\Development\ArduinoAT\Arduino\tools-builder -tools E:\Development\ArduinoAT\Arduino\hardware\tools\avr -tools C:\Users\Philip\AppData\Local\Arduino15\packages -built-in-libraries E:\Development\ArduinoAT\Arduino\libraries -libraries E:\Development\ArduinoData\libraries -fqbn=arduino:avr:uno -ide-version=10802 -build-path C:\Users\Philip\AppData\Local\Temp\arduino_build_309245 -warnings=none -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avr-gcc.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.arduinoOTA.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -verbose E:\Development\ArduinoData\LCD_I2C_Test\LCD_I2C_Test.ino
Using board 'uno' from platform in folder: C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.3
Using core 'arduino' from platform in folder: C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.3
......
============<Using v1.8.13 to verify/compile>===============================
Arduino: 1.8.13 (Windows 10), Board: "Arduino Uno"
E:\Development\Arduino\arduino-builder -dump-prefs -logger=machine -hardware E:\Development\Arduino\hardware -hardware C:\Users\Philip\AppData\Local\Arduino15\packages -tools E:\Development\Arduino\tools-builder -tools E:\Development\Arduino\hardware\tools\avr -tools C:\Users\Philip\AppData\Local\Arduino15\packages -built-in-libraries E:\Development\Arduino\libraries -libraries E:\Development\ArduinoData\libraries -fqbn=arduino:avr:uno -vid-pid=1A86_7523 -ide-version=10813 -build-path C:\Users\Philip\AppData\Local\Temp\arduino_build_912084 -warnings=none -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.avrdude.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avr-gcc.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -verbose E:\Development\ArduinoData\LCD_I2C_Test\LCD_I2C_Test.ino
loading hardware from C:\Users\Philip\AppData\Local\Arduino15\packages: loading package arduino: invalid version dir C:\Users\Philip\AppData\Local\Arduino15\packages\arduino\hardware\Arduino_STM32-master\STM32F1: no major version found
Error compiling for board Arduino Uno.
=========<End of mesages>=======================
I'm not sure why it is looking at STM32 at all for this board
Do I revert to an earlier version for now?