Hi! Welcome to the Forum theBFG !
Here are all important links:
http://lmms.io/forum/viewtopic.php?f=1&t=4740
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That sounds like you not are using the correct sitei was downloading LMMS :: forbidden download
I recommend you to dl our RC6. If you use win10 you have to!
These are the correct dl 's
64x https://github.com/LMMS/lmms/releases/d ... -win64.exe
32x : https://github.com/LMMS/lmms/releases/d ... -win32.exe