Hi !
I would feel better with a clean install, is this possible? Will it work after copy my files (which folder do I have to copy)?
Yes, this will work.
Just install a new DokuWiki, configure, install your plugins. you probably want the indexmenu plugin for the tree-menu.
Once you have a working Wiki, replace your data directory with your data directory from Angua :
• when copying the files, be sure to use a tool that preserves the file modification timestamps (under linux, for example, the tar cmd is ok. for other systems I don't know). If file modification times are not preserved, then DW will think the files have been edited externally and wil create a new revision. Also last change will list all the pages...
• rename security.png to dont-panic-if-you-see-this-in-your-logs-it-means-your-directory-permissions-are-correct.png
• rename security.xcf to dont-panic-if-you-see-this-in-your-logs-it-means-your-directory-permissions-are-correct.xcf
• Make sure file ownership and permissions (and any other security mecanism on your new system) are correct for your server
• remove the directories named a b c d e f 0 1 2 3 4 5 6 7 8 9 in the cache subdirectory
Then browse your wiki and visually inspect all your pages.