Source: https://forums.phplist.com/viewtopic.php?f=34&t=41237
Timestamp: 2019-04-18 13:18:16+00:00

Document:
phplist forums • View topic - Install v. 3.0.6 on the same server as v. 2.10.19?
Install v. 3.0.6 on the same server as v. 2.10.19?
I'm currently using the old version of phplist (2.10.19). I would like to test the new version (3.0.6) but don't want to upgrade the old version just yet, since I've tweaked my current installation quite a bit and am not sure if the new version provides the same functionality.
Therefore I'm wondering if it is possible to install the new version alongside the old version on the same server? If so, is there something I have to pay attention to in order not to tamper with the old installation?
Re: Install v. 3.0.6 on the same server as v. 2.10.19?
Yes you can, however be sure to use a differently named directory and database.
For example, if your version 2 install is in domain/lists use something like domain/list3 or similar.
Remeber also that config/config.php file is a quickstart option, from what you say abut your customised version 2, I'd recommend starting with the config/config-extended.php version, RENAMING it to config.php before you start, thus replacing the quick start smaller config.php file.
Great! Thanks a lot for the useful tips!

References: v. 
 v. 
 v. 
 v. 
 v. 
 v.