Virtuemart - admin page - any help?

I know this doesn't have anything to do with you guys, but hope to get some kind of advice as to what to do - you know Virtuemart from the inside.
My site http://v-boge.org/ has gone through all versions of VM from 1 to 3. Now I realized that there is some error on the inside - admin view doesn't really work the way it should.
When I am in list view, menu on the left looks right: Categories collapsed and it looks neat. https://yadi.sk/i/Rzq29IDCtMJBRBut when I go to product edit view, or shop-shop (settings), the menu on the left looks weird, categories are not collapsed, and no tabs on top the screen: https://yadi.sk/i/XHCFIak1tMKxj.
I used to ignore it, but today I needed to add some custom fields and run into bummer - I can create the field itself, though when I am trying to add it to the product - nothing happens - it doesn't work, and I suspect it has to do something with layout file being broken or something like that.
Any advice as to how to get it fixed?
Thank you in advance,
Victor

Hi

Possibly some conflict with other extension. Just to be sure overwrite VM files with a clean installation to exclude broken files and send me new access to joomla panel, old one is not working.

Thank you, I've rebuilt the whole site and already published it. Might be into huge SEO blow, but it's already done... Now everything works and I don't have no trash leftovers from J1, J2 and all the components, plugins and stuff... Thank you though.

Hi

Ok. Glad to hear it's working. Closing this thread than.