Just click "Addons" Button on your Panel 
Available Version:
• SAMP 0.3.7 Server Version
• SAMP 0.3.d Server Version
• SAMP 0.3.c Server Version
• SAMP 0.3.z Server Version
• SAMP 0.3.x Server Version
• SAMP 0.3.e Server Version
Sorry, but, what is that?
When i take my server i need this, thank you.
Now i don't need to do a new thread for "how to change server version?". Thx?☺☺
Thought it was a full explained tutorial lol
If you check the knowledgebase you'll find out how to change server version easily. That means, this thread is pointless.