Jim M

I would advise editing those configurations so you can see the custom URL. From that screen, you still cannot see it but the uploads configuration is in use. 

Are you viewing as yourself or another user? Is that user an administrator? Unfortunately, I cannot reproduce this as a regular member when an administrator is anonymous. However, I can see my own online status when anonymous.

Sorry. Similar to our last design, we only will use it here on our website. It is a quick taste of what is certainly possible when theme-ing and developing with our software 😉. Of course, with saying that, the only things that are radically different are the header/footer. The rest is pretty much the default theme that ships with the software with some basic color tweaks.

Any communication from us will be sent to your email. We did receive your support ticket and you will receive a response via email when we respond back.
I understand things may be a little confusing right now but please bear with us in this change.
You're more than welcome to start any issue with your community here in the Forums and we can transfer it to a ticket if a technician determines it necessary. This will be the eventual flow. 

Unfortunately, that specific editor toolbar button is for size so will put in inline CSS for font-size. There may be a CKEditor plugin for specifically H1/H2/H3, etc... However, you might be able to do like we did here and create your own custom button with a little HTML: 
 

Being able to create paid files is on the member group so they would be able to perform this anywhere applicable, including Clubs.

Pages is our Content Management System(CMS) application. Has a lot built into it. I would suggest starting in our Guides to get a feel for what it can do: 
 
Can create static and dynamic pages, build Databases to create an article system (or other custom data types), custom blocks/widgets, and more. 

Can find our rewritten URL .htaccess in ACP > System > Search Engine Optimization > in the description of “Rewrite URLs?”

Gotcha. Now that I also allow my base member group to download (I had an upper group but not the base member), I see what you mean. In normal operation though, I would imagine users would want to encourage their guests to register to download. If you don't want people to register, I'd advising disabling registration. I don't think this a bug but rather a change in the feature which you'll want to suggest.

They would only keep refreshing if you keep visiting within that 90 days. If you do not visit till 91 days then you have to login again. This is pretty much standard for low-medium secure websites. I honestly can't remember the last time I had to login to Facebook, Twitter, Instagram, etc... because I visit those on a semi-daily basis.

Sounds like something is not quite right with Javascript or the theme on your community since upgrading. Either there is a theme compatibility issue, cache issue, or a write issue on the server. I would recommend clearing cache by going to ACP -> System -> Support. Then try again.
If that does not help:
Switch to an unmodified theme and check again. Check to ensure write permissions on your server are correct. If you're on our Cloud, please submit a ticket as we would need to see what else is going on.

There is no delete all messages button, I'm afraid. To delete a status update, you will need to click the status update and view it. You can do this by clicking the status update in the block or going to the profile of the user who posted it. You can then delete it by clicking "Options" then "Delete" as outlined below in the screenshot.
Moderator permissions control what you can moderate on the front-end of your community, such as here. You will need to ensure your group has correct moderator permissions. Administrator permissions control what you can do in the Admin Control Panel so simply because you have an administrator account does not mean you have moderator permissions. For more on this, you can read the following Guide: https://invisioncommunity.com/4guides/staff-and-moderation/creating-administrators-and-moderators-r31/
 

There is not a separate mobile view in our software as a responsive architecture is used (aka we adapt the view based on screen-size). CSS loads for a whole page regardless of what screen-size is used. You would need to use media queries to specify what parts of your custom CSS should render for certain screen-sizes: https://www.w3schools.com/Css/css_rwd_mediaqueries.asp

This warning in your ACP is a strong recommendation as these functions can be dangerous but our software can run without issue with them enabled. This is merely a recommendation to strengthen the security of your server as our software (and others) does not utilize these dangerous functions (as mentioned in the warning). If you are on a shared server, you may not have complete control over the server as indicated by your hosting provider. This would be something you would want to research if you want the capability to better secure your server or stick with your provider.