Update with a bugfix and QoL improvement (v1.5.88)

There's an update coming up today,  V1.5.88 (for those who care).

It's got a fix for Linux and Mac users since there was a '/' missing in the path for those systems causing issues.

Also it's got updated scene import functions. It will check for all missing audio and give the user the option to download everything from freesound in one go. 

Local files shared still need to be placed manually by users of course.