did some simple tests on 1.200 portable and 1.33 portable, no problems. I'll do a backup, when it's done I'll test this on calibre 1.43 64 bit with my 'real' libraries, where I have different views on different libraries with custom columns etc - this will replace the existing View Manager.
Thanks for taking on some of kiwidudes plugins - much appreciated.
Added : Tested on 1.43 64 install version with my real libraries - no problems works fine
BR