TinyTake is licensed per user. Each purchased user can have the software installed on upto two machines – for example you can install your program on both a desktop and a laptop (typically, people install it at work and at home). As long as you are the only user, this is a valid use of your license.
If you wish to install on a another computer then as long as you uninstall from one of the the two machines you have earlier installed it on before you install on the new machine you will still be within the terms of your license.