Now I've installed the BETA 10.4.2227 - "in memory of Jan Koubek". And everything works fine! I'm happy again.
In Outlook 2002 the right click menus are available again, and also the access to the internal Outlook 2002 address book is recovered!
After many years of using avast, now is the time to give thanks for the avast-team for providing a fast and lean antivirus programm.
In the last years I've tried many different AV (Norton, Comodo, Avira), but Avast is the only one which works with an efficient usage of Memory and CPU.
To compare: Avira needs approx. 600 MB Memory, and each call of a website produces a high CPU usage. In my case, I work with an old 2000 Ghz Pentium Mobile Processor, with 1GB RAM, this is not practicable and usable. Imagine, the Windows XP itself needs about 230 MB RAM, now a AV like Avira takes further 600 MB Memory - this remains only 170 MB Memory for executing of programms. That's absurd.
On the other side, avast need only approx. 90 MB Memory, and it doesn't retard and strain the CPU very much. I hope this efficient usage of Memory and CPU will be persist in the next years.
Sadly, I've to say avast has produced in the past years from time to time some huge bugs. To be fair, the others (e.g. Norton) do the same. Especially, the avast automatic programm updates of some past releases caused serious Windows XP problems from time to time.
For instance, since a few years it's no more possible to disable the avast addin inside the Outlook 2002 for test purposes in an emergency, because there is no more avast entry in the Outlook-addin area.
Maybe my post should be better stored in the Beta Release section?
Finally, I want to ask if I have to deinstall the Beta Release, if I want to use the next regular avast version? Or could I receive the next regular avast version about the automatic programm update function of my current beta release?