I've tried your advice and I have read 'Common-installation-issues'. It got a little better, but still kooky Dreamweaver.
Some menu titles are still with strange characters (see screenshot).
When I open an existing document in Dreamweaver, the WebAssist: Uninstaller starts up. But immediately it pops up an error message "... WA_inInstall2.htm": files has no proporties "(see screen shot). And I have to force quit Dreamweaver.
What should I do? Dreamweaver does not work anymore.
It's not fun now after a break in Dreamweaver - come back and discover that it just causes trouble, if you know what I mean.