Correct ways to upgrade vm2

[myplace2100]

I want to upgrade virtuemart to latest version as i have 2.0.22a version installed which is a security risk. So I will do update process locally then i will move my joomla site to production server.

So, which link i follow to upgrade, clicking the upgrade link at left bottom in vm component or clicking virtuemart-aio component(which i installed before) ??
Or what could be the best ways to upgrade as i am things locally.

[jenkinhill]

http://forum.virtuemart.net/index.php?topic=123808.0

[myplace2100]

So auto upgrading either from component or virtuemart-aio shouldn't be done.so, i need to download latest package from the link you provided and install over the previous version? Will it keep all previous version data and plugins like what we mean by upgrade ?     

[jenkinhill]

Yes, data will be retained, as is normal with all J2.5 that I have used.

[myplace2100]

ok now i think i should download stable version like i did download "com_virtuemart.2.6.0a_extract_first.zip" under "2.6.0 (stable, hardened version) section" in the url u provided. is it right for use?? I will soon install that version over my existing vm 2.0.22 locally. What errors and incompatibility might arise because of that upgrade to 2.6.0 ?? which i should take care of ??

[jenkinhill]

You should get the latest version, com_virtuemart.2.6.2_extract_first.zip  ( http://dev.virtuemart.net/projects/virtuemart/files )  Note that you must have PHP5.3.10 or better on the server, preferably PHP5.4+

Possible issues are a failure to check the new configuration options in the latest version, or template overrides that need editing to work with the latest version.