Unable to ugrade Virtuemart AIO from version 3.2.14 to 3.4.2

[ermes]

When i click on upgrade button from administrator panel to get the new version of VM AIO extension (from v3.2.14 to v3.4.2) joomla return me the following error:

Joomla\Filesystem\File::delete: Failed deleting inaccessible file vroute.php

[GJC Web Design]

hmm ..  this is a system plugin com_virtuemart.3.4.2.9966_ext_aio\plugins\system\vroute

u can try again with the  AIO http://dev.virtuemart.net/attachments/download/1142/com_virtuemart.3.4.2.9966_ext_aio.zip - just install

if not extract the files for that plugin and ftp to where they need to be and rerun

[ermes]

It return me the same error

[Milbo]

The strange thing is, that the installer does not delete files. I cant remember that I wrote it and I cant find it in the installer. So how the heck tries the AIO installer to remove the old plugin. The vRoute plugin was just an idea, it was not meant to be distributed.

[ermes]

I can't uninstall it. It show me same error of update.