Hi! Currently the only way to do this is to use \"Open Append\" under the File menu. We plan to make this much easier to use in a future version. And since you have Free Lifetime Upgrades, you won\'t need to pay for new features like this.
Your license count is directly related to how many machines you can have in the Primary tab at one time. So for example, if you have a 50+25 node license, you\'ll only be able to have 75 nodes \"loaded\" at any one time unless additional licenses are purchased.