The wonders of Windows programming never stops amazing & bemusing me but that's good to know it's been able to start ok in a normal location (i'll have to find & update the other thread where it was reported to see if that's also the case for them).
The vis window in the playlist editor is a known issue as I've not yet worked out what is causing that as part of the transition between winamp's code doing things & my code instead doing it (with the vis drawing still being something I've not tackled yet). It is a beta / preview after all
On first run of a new install, there should be a skin selection dialog that allows for selecting between the range of 5 skins that are included by default. the dialog is setup to actually try to force the user to make a choice instead of imposing a default unless using the likes of tabbing navigation at which point it will pre-select the classic skin as that tends to fair better from an accessibility view point.
As for classic skin scaling, that's a whole can of worms as the handling at the moment is still shy of being able to do double-size windows / frames on everything. WACUP does much better than Winamp in that respect as I've added support for the main playlist editor & the generically skinned windows (e.g. the media library window) with the video window the last on that needs to be replaced. Winamp proper just does the main & eq windows. When more of the handling is one by WACUP then I will be looking for classic skins to have some other scaling values as I don't have access to a 4k or a 1440p screen at the moment but I appreciate there is a desire from those using such screens for something that can play better with them.
-dro