Beware selecting an individual package to be upgraded. Sooner or later that will break your system. Always after reloading the package lists use the mark all upgrades button. As you've upgraded a single application you really need to do that urgently to ensure everything you have is designed to work together.
PCLinuxOS is a 'rolling release' or dynamic distribution. That means you can keep an installation of it going for years with weekly upgrades. Most Linux distributions bring a new .iso out every six months and drop support after a year or so. With pclos it is just updated continuously.
However, the price of that is a disciplined approach to upgrading - all or nothing, because there's no guarantee today's applications will work with yesterday's libraries etc. Weekly or fortnightly is the best frequency for upgrading, but try not to leave it longer than a month. The longer you leave it the more complicated the problem becomes with a growing risk Synaptic and the programs it relies on will be unable to work out what to do.
It's also a good idea to keep an eye on this forum to be warned if there's a problem or if any special instructions are needed , as occasionally happens.
With those two provisos you should find things work well and any problems will be easy to sort out for a good while. I installed pclos 2007 and kept it until the beginning of 2010, when everyone had to re-install because the upgrade path became too complicated to manage. If looked after, this OS will just keep going the way you like it. You can also remaster it which means making your own live media so if you do have to re-install you can keep your system the way you built it rather than reverting to the generic disc, so once you have your wanted apps installed you can make an installation disc (or usb) which will include them.
Enjoy your stay here. It's good.