Hi,
Sorry to read about the troubles today.
If you want new nodes to appear below the current node instead of to the right, turn off this menu option:

- addNodesDirection.png (24.61 KiB) Viewed 1563 times
If you turn on the menu option to always auto-arrange after adding a node, it will arrange according to the setting of the menu option above. I prefer to
not auto-arrange after adding a node. This way I can manually set where each node should be. If I want to auto-arrange a group of nodes, I can always multi-select them, right-click on them, and select Auto Arrange from the context menu to auto-arrange only those nodes.
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A node's expanded text input area will appear when you double-click on a node. If you only single-click, it will select the node. Then you can drag the node to move it.
When you double-click on a node to edit its expanded text, I do see the issue where the cursor jumps to the beginning of the text. I'll work on a fix.