hmm.. B|
what you could do was to use the new theme as default..
Then you do like so..
Copy current default theme-folder to a safe place -You need this to revert to default theme at a later time!
Unpack the downloaded theme
Replace everything in the LMMS|\data\themes | default
with everything in pack
Then retry
What i expect to happen is that you will use the new theme as the new default, but if it fails, then you need to copy the safety-copy back, and overwrite the 'hacked' default folder, so make sure you have made that default safety-copy!
Let me know it this hack worked, if you try it :p