Hi Margaret

Start your copy of nvda with the following keys ctrl + alt key + the letter N

Now you have NVDA running press the following keys the NVDA key + ctrl key + the letter S this will bring up the select synthesizer settings in NVDA. You can arrow down and up this area to see what other synth packages there are.. You should be able to select one from the ones there. If you say the other ones have become unregistered it may not be a good idea to pick them until they are..

You should after picking one be able to tab down to the ok button then press the enter key on the ok button.

To pick a voice from that package do the following

Press the nvda key + ctrl key + the letter V this will bring up the voice settings section in nvda.

You will notice in this section it will also say the synth package you used and you can change it from there this is in nvda 2019.1

Tab down until you hear NVDA say voice or if you tab again after it varient. In either of those 2 sections it is a combo box you can use the down and up arrow keys to pick a voice. find one you like and press the enter key on it to select it.

You can also change the rate of your voice etc from this section.

You can then use the nvda key + ctrl key + the letter C to save your configuration.

To update your version of nvda use the nvda key + the letter N then when the preferences section comes up or the menu then arrow down to help a sub menu will come up i think when you use the right arrow key. then arrow down to check for updates and press the enter key.

It will then check for a update and if this is one which there will be download it to your computer it will install over its self. Just follow the directions to do that.

Hope it helps.

Gene nz