I downloaded 1.5.8 BETA and then tried to run it. All I get is a message " Could not load due to fatal error. ".
I already had 1.0.4, 1.0.5, 1.0.5r2, and 1.0.6 loaded on my computer and they were all working just fine.
Now all my Arduino IDE's will not load and all I get is the error message.
I then deleted 1.5.8 BETA and re-installed 1.0.6 with no success.