Hello @nickelas,

The upgrade instructions are in the manual, and it's completelly safe to do it straight from 3.3.2 to 5.0.9. However, I recommend you to do the following:

1) Copy your old database to the new server. Making an sql dump and importing it in the new site is the most common method.
2) Upload the code of b2evolution version 5.0.9 to your new server
3) Copy the file /conf/_config_basic.php from the old server to the same folder in the new one. Make sure that the domain is correct, so the variable $baseurl in that file should match with the new URL of your site. If is the same, it will need no changes. Important: you may also copy the content of the folder /media and all the third-party plugins or customized skins that you're currently using.
4) Go to your new URL as usually. The system will warn you about the update and you should accept to continue.

If you have any concern or doubt about the process, please tell us.

Regards!

Thanks! I did more or less like you wrote except I used Installatron to install b2evolution then pointed to the imported database. When I go to the url I get the message:
.."Database schema is not up to date!
You have schema version 9960, but we would need 11110."..

Yes, that's the supposed messages that you should get, just look for this line:

On most installations, the installer will probably be either here or here... (but I can't be sure since I have no config info available! :P)

and clicking the first link, you will be lead to the installer screen. Just make sure that the option Upgrade from a previous version of b2evolution: is selected and press the button GO!. Remember to make a copy of your database first, just in case something gets wrong.

Regards!

Thanks again! Problem was there were no files on either of those links, I guess Installatron deleted them. So I uploaded the installfolder, pressed the link and now it seems to be working.

Excellent @nickelas, nice to know it.