Vassal 3.5.4 or 3.5.5 Does not install

I have Vassal 3.5.3 installed on my 2010 MacPro with Mac OSX 10.11.6 (El Cap). I can’t seem to install either version 3.5.4 or 3.5.5.
Any help to resolve this issue is much appreciated.

What happens when you try to install? What errors are you getting?

Hmmm…after restarting my MacPro I was able to install v3.5.5. Don’t know why but at least it works.