Probably not; the only software requirement is Microsoft Silverlight. It should already be installed on your system, but if it is not then you will be prompted to install it when you try to access Web UI.
There is a known bug that affects certain cross-application screens. Datatel is working on a fix for this issue. In the meantime, just type the application name, dash, and the screen name: for example, 'ST-NAE'.
To save the form that you are currently in, click on the yellow star icon on the form wrap menu (upper right hand corner of the form). To save the student (or other entity with a colleague id), click on the yellow star icon on the upper right of the context menu.
When a report browser window opens you have the option to download the form or open it in a new tab as a pdf file (or a few other things). It can then be printed like any other document. Also, when you need to print information from a form that doesn't generate a report, there is a print icon/button next to the star symbol on the form wrap menu.
In order to leave a screen and keep your context list, simply click either the 'Save All' or 'Cancel All' button. This will save or cancel you out of the screens you are in and keep your context active.
No; like in the old system, you can only access the 'deepest' screen at any given time. You still have to move back from the bottom to the top to update screens. The ability to view higher screens is simply a convenience.