Blond Knight,
Koios is in fact no longer in business, their employees went their separate ways shortly after PCK's release and now work in various other companies. We at Matrix are working on the update together with community volunteers and a new developer who will be continuing the series. If your issue is that you updated to IE8 and the external tools no longer work, then the fix for that has already been posted here and you do not have to wait for the next update for that.
http://www.matrixgames.com/forums/tm.asp?m=2220232
This coming update is effectively a labor of love for a game that (apart from the IE8 fix above) does not really require any fixing. We released PCK in good shape and updated it quickly to 1.01, which addressed all the significant known issues at that time (before IE8 showed up). The next official update will contain a vast amount of new content as well as some additional fixes for various minor bugs that were noticed since the 1.01 official update.
This upcoming update is very much a "community update" with many community volunteers putting in many hours to improve both the tools (and create a new Map Maker) as well as scenarios, campaigns, and new units. I consider it a privilege to work with these folks and I believe the wait will be worth it and the future of the series much better thanks to their involvement.
Regards,
- Erik
http://www.matrixgames.com/forums/tm.asp?m=2050854&mpage=3