(A) No. A Wisdom-soft product license is issued with a license key that has no time limit. That is, it is forever.

(A) You can uninstall the current version and download the new version to install.

If you order online, here is how,
http://www.wisdom-soft.com/kb/faq.htm#how

If you pay by PayPal, on the PayPal order page, you can select "Upgrade..." from each item dropdown list and then enter the quantity.

(Q) I have installed 5.0 Pro but cannot enter my licence code anywhere. The button under help that says "register" is greyed out and the screen shots have writing across them???
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(A)If it's grayed out, it means it has been licensed. You don't need to enter the license key again.

(Q) I would not like to pay for twice wonder if I can get a better discount
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(A) The bundle price is $99.95 for all four products.
Since you're registered user of ScreenHunter 5 Pro, we will refund the US$29.95, full amount of ScreenHunter 5 Pro back to your PayPal account.
To make it simple, please order the bundle with $99.95 and we will refund $29.95 to your PayPal account after processing.

(Q) I saw Screen Hunter 5.0 Pro while at training in California. I wanted to try it out for awhile before purchasing the product. I downloaded the free product and used it. Extremely easy to use, which is what I wanted. But when I opened the viewer, it says “EXPIRED” across the front. Am I to purchase it before using it? If not, is there a 30 day registration key I can use?

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(A) If you can see an "Expired" stamp, chances are that you're using the "Pro" or "Plus" version, not the Free one. You can check the "About" box to make sure.
The Pro or Plus version has 15 day fully functional free trial period.