Have just upgraded a RB493G from v4.x to v6.18. The initial web page (at http://192.168.88.1) still shows the old brown/beige Router OS Configuration Page with links to webbox, rather than the newer icon style with webfig. If I manually go to http://192.168.88.1/webfig, everything appears normal.
Is there a way to upgrade the web page as well? On my other RB493G, this just worked…
Thanks,
Richard
use netinstall
Clear your browser cache.
Why you give wrong answers today? 
http://forum.mikrotik.com/t/how-to-logging-ntp-server/79713/4
If are on the browser cache, can not be writed on the html page 6.18 but still 4.x
Thanks - netinstall fixed it.
Any way to do this without netinstall? Board is 7.5 hour drive away, and accessible only by internet over VPN.
Was the same, 4.X to 6.18.
Can I install another version, like 5.X and then 6.18 to fix this?
But a good question is, why does this even happen? 
Is absolutely wrong upgrade without netinstall from 4.x to 6.x
I never have use netinstall with success on distant machine.