|There are no yearly renewal fees. Once you purchase PowerSeek you can use it for as long as you want. Major upgrades or 'version jumps' (for example from ver 3 to ver 4) will require a nominal fee.
If you own more than one license then you can just pay for one upgrade. You can then upgrade the rest of the licenses you own for free. (The upgrade fee will include free upgrades for the rest of the licenses you own if you own more than one PowerSeek license.)
Major upgrades (or version jumps) will contain many new extras and will be a large upgrade. Note that the existing upgrades within versions (for example from ver 3.1 to ver 3.2 ) will always be free. Major upgrades (or version jumps) will be released once every two years.
If PowerSeek Ver 4 for example has been released then you can still keep on using ver 3 - you don't have to upgrade if you don't want to.