First of all: I have found a good, simple and practicable solution to be able to continue running LO installations ≥ version 7.5 with the old icon set (since version 6.1). (However, creating this solution and researching it took me two days).
But before I present the solution (below), I would like to agree with the criticism of the thread starter and go into a little more detail. For some time now, all kinds of software companies have had the bad habit of replacing the old branding icons with new ones, and each time the newer icons have fewer contours but more garish colors. Here, with the new icon set of LO, the following was even worse: If you have more than a few LO files (or at least shortcuts to LO files) on your desktop, then the new icons look really brutal, and this new appearance as a whole was so unbearable (at least for me) that I took a lot of time to get rid of this problem, since LO Writer is my most used program on my computer. Another point of the aforementioned “bad habit” is that humans – young and old – are actually “creatures of habit”. But if this is the case – and it is indeed the case – why are icons that we have become accustomed to changed again and again at such short intervals? I don’t believe that there are any (LO) users who want this, and if they do, they are probably very few. There are completely different things that users want, e.g. that the problem with the double line style of borders that has existed since version 6.0.0.1 is finally solved or that the current scaling factor problem is not pointlessly obstructed by the (paid) people in charge instead of supporting those who want to improve LO in their free time. But for new (questionable) icons that nobody needs and that probably nobody “ordered” – there is time for that.
But now to the (promised) solution: I tried the FileTypesMan tool mentioned above and discovered that the registry always refers to the same file regarding the default icons, namely soffice.bin. So I thought to myself, if I just save the soffice.bin from the last LO suite (7.4.7.2), copy it to a different folder than the already existing soffice.bin of the current installation and change the registry entries accordingly, I will get the old icons in a new installation as well. This assumption was confirmed.
So I laboriously copied out all 197 registry entries that refer to the default icon of LO and created a reg file that I can easily use for future installations. I changed the original path of each entry (@=“C:\Program Files\LibreOffice\program…”) to @=“C:\ProgramData\LibreOffice\program…”.
For a new installation, proceed as follows: First install the new version of LO, but do not open a program, but restart. After the restart, first create a folder “LibreOffice” under C:\ProgramData and then a folder “program” underneath. Copy the saved soffice.bin from the last version with the old icons into this folder. Now double-click the created reg file, restart the computer and the old icons are back in the shortcuts.
Incidentally, it does not matter whether you use a soffice.bin (v. 7.4.7.2) from a 32-bit or 64-bit installation. Both files work with both 32-bit and 64-bit installations.
Since neither *.bin nor *.reg files can be uploaded in this forum, I have presented the solution (including a zip file with both files) to the thread starter drunkencommie, who uploaded his effort to solve the problem to GitHub.
Greetings,
Ransom1