Been using this beta all week and it's been pretty good.  It could very easily be a placebo effect as I haven't used WindowFX since the Win10 betas started, but it seems noticeably smoother.

The major issue i have is that the animations frequently just stop working (I haven't discovered anything in particular that triggers this yet).  When this happens, any animations I've turned on simply don't execute (ie. you close a window and it disappears with no animation) and with wobbly windows switched on, moving a window will cause it to turn invisible until you stop the move action.

Toggling the WindowFX features option in the Home tab from ON to OFF and then back to ON again fixes the problem - until the next time it happens.

Is this happening to anyone else?

The words "here" in the original post are the links, click on the one in the original post that applies:

https://esupport.stardock.com/index.php?/default_import/Knowledgebase/Article/View/104/101/how-can-i-get-my-registration--product-key-information

http://download.stardock.com/

If so please uninstall WindowFX, REBOOT and reinstall.

I've experienced almost the same behaviour. After contacting support (ticket still pending) I decided to take matters into my own hands, uninstalled WindowFX 6 beta completely and reinstalled it from scratch. Currently I'm testing and so far it looks good. But I cannot really confirm anything because it has only been a few hours since I reinstalled it. I will post my results as soon as I've observed WindowsFX's behaviour for a while.

There are still a lot of problems. Unusable.

I was able to install the 6 beta without issue on Windows 10 and things seem reasonably good.  Two minor issues I'm running into, though, in case it's useful to report:

1. As mentioned previously on this thread, the animations will sometimes just cease to work and dragging windows results in the window disappearing until I release the mouse button.  The same solution mentioned above also works for me:  simply flipping WindowFX to disabled and then enabled again resolves the issue.
2. WindowFX doesn't always seem to play nice with the animations Windows uses when flipping between virtual desktops (win+cntrl+right/left).  Sometimes it works perfectly, but other times, instead of the smooth transition between desktops (sliding the desktop to the next one), the next desktop will just appear.  This doesn't happen always though.

Also, one item I'd add to the "wish it did this" list:  It'd be cool if the Windows 10 menu animation could be adjusted from the default.

Very pleased to see this beta version working with Windows 10, particularly as I have had to uninstall half the Stardock software I owned since upgrading because they no longer work fully, e.g. WindowsBlind, ModernMix, Decor8, etc.

Anyway, the software seems to be working fine (...so far) but one thing I would really like to see added is an option for WindowsFX to remember window positions because, for example, opening up the File Explorer window always results in it annoyingly moving down and to the right every time I re-open it. This behaviour did not occur in Windows 7 or 8/8.1 so I don't know why Microsoft thought this was an "improvement". Other windows seem fine (as in their positions and sizes are retained) but an option to remember windows positions and sizes would still be extremely useful IMO.

So far working 'ok' on Windows 10. (specifically purchased WindowsFX)

One glaring issue is GPU VRAM usage. It's insane. Has to be a memory leak somewhere. VRAM hits 700mb+ after 10 hours uptime with WindowFX on.

EDIT: Now it's hitting over 900mb VRAM, just at the desktop.

If you are a sucker for the transparent background windows and giggly windows like me, these seems to be a temporary fix.

Turn menu animations off, and for window animations only use the lower half of the options. You know, the options that do not have a preview function, the more simple animations. That seems to keep VRAM at around 170mb, near vanilla windows.

EDIT: Actually it's more then that. But it's still better.

Can you post your ticket ID?

Unfortunately you keep replying to your own ticket. This resets your place in the queue and delays our response. I will forward it to Bilal however so we can get you a response soon.