Not for website novices - like me - at this date. Maybe later! Sloppy tutorials. Many screaming curses today. The recurring flaw in the tutorials is failure to tell you that you have to do A (or how to finish doing A) before doing B will work. It took a lot of frustrating guessing at why the program was ignoring my wishes. Having successfully crossed that bridge numerous times by trial and error, I do not hesitate to declare this inadequacy in the tutorials.

The topic of webpage borders and grids is so sketchy that the writer seems to be trying to avoid it. I insert a standard template and preview it in my browser, but only the top 2/3 of the standard template appears in the browser. Sizing the webpage to satisfactorily appear on many different kinds of computers must rate as a key topic of concern, but I am still clueless about that.

To avoid using HTML, I was ready to love this software, but this affair is too problematic for me to handle for a while.

It has been two months since I here panned BookMacster for vacating some of my bookmarks folders. I did not ask for a refund because I felt that the developer had done his job. I was giving up on using it. Jerry is obviously a maestro among programmers, and his user documentation is the most precise and unambiguous I have ever seen in any program.

I think that I probably tortured BookMacster into malfunctioning by exercising it too intensively for the purpose of learning to use it.

Now I return to my question of whether BookMacster should ever have been written. Reviews of browsers always come from the same sources, when full time users (professional tech writers or programmers) are periodically reviewing and reassessing their own choice of browser. I dare suggest that very few users jump between numerous browsers several times per hour, which would justify the utility and complexities of BookMacster. If all my browsers did the same things well, then I would only use one of them. Chrome seems to be the master of playing well with other websites, while they have publicly stated long ago their lack of interest in the downloading functions. Firefox is great for downloading, but often bugs out or beachballs on intensive research projects. So I choose my add-ons and bookmarks differently for these two browsers.

I wish that the SOP for BookMacster was the same as Bookdog, to remain idle until I see the need to stop my browsing and give the command to close all the browsers and do its thing. (My moist fantasy would be to eliminate all the electronic rummaging through all my bookmarks in all browsers, and simply drag the one bookmark folder I need from one browser to the other!)

This is my reply (with comments) to the question of my not requesting a refund for the software. Hats off to you, Jerry, and I wish you well!

Run your backups before you take on this monster! I ended up with several emptied bookmark folders in ALL of my browsers (which the developer was unable to surmise as an undesirable outcome).

BookMacster forces the user to work around it by requiring the user to close browsers so that it can do updates to the browsers. This is sonotgoingtohappen.

Uninstalled. Money wasted.

I downloaded Version 1.0, which is 76.5 MB, not 765 MB. It is free, and it installs itself directly to the Applications folder. The publisher is an online gambling games outfit. The app for Mac is a rework of an app for remote devices. As a former yoga instructor, I rate the 1.0 content as worthless.
You can upgrade to 1.1 for $4.99, at a robust 1020 MB. User reviews of the phone version were raves for portable convenience, but more discerning reviewers criticized presentational flaws in the program. There seems to be a lack of detailed concern for safety instructions in 1.1.
You can easily hurt yourself very badly by doing the postures in an uninformed way. If you want to do yoga postures, I recommend that any practice be accompanied by a DVD (not a book) at appropriate level of difficulty with detailed pointers on how to take the postures safely.
95% of the benefit is in the dozen or so most basic postures. Beyond that is just showing off.