Here is the error I'm getting:
Resolver: Install error - slf4j.log4j12 Exception's name: java.io.IOException, Exception's message: Error accessing file:/Volumes/HD/.itmstransporter/obr/1.9.8/slf4j.log4j12-1.7.25.jar
I had the same problem. Try:
cd ~
mv .itmstransporter/ .old_itmstransporter/