Hi,
Firstly, I thought I'd mention what the problem is with your register page at the moment. Your site is missing the
php-curl extension, so you can use the command
sudo apt-get install php-curl (Ubuntu/Debian)
before restarting Apache with
sudo service apache2 restart
As for updating from v1 to v2, the instructions are as follows:
1. Backup your current v1 files and the database (important - you can't downgrade after updating)
2. Remove all of the v1 files from your web server, but do not touch the database!
3. Upload all of the v2 files from GitHub using the links below
4. Run through the installer and make sure you select the v1 upgrade option on the first screen
The v2 links are as follows:
The latest development code includes some fixes from the pre-release so you might want to go with that.
v2 is currently missing some v1 addons such as Donate, Infractions, Ban Appeals, and also the Staff Applications core module. These are all coming soon, although there's no estimated release date for them yet. If you want to see the existing v2 modules and templates, you can find modules
here and templates
here, however not all are updated to pre-release 5 yet.