I have 4 instances of Arduino installed. 2 on one laptop, and 2 on another. On each laptop I have installed "arduino-1.6.13" and "arduino-1.8.4". The reason for both "arduino-1.6.13" and "arduino-1.8.4" is all my sketches were in "arduino-1.6.13" and I had a reason to upgrade a while back though …

1.8.4 IDE will not use new sketches directory location

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