The default theme is the same for all version, after the template made is to help you to make you own more easily or to create your own module.
Do you activate the rewrite SEO in Configuration/Store ?
Without SEO : http://mysite/shop/index.php?Account&LogIn
With SEO : http://mysite/shop/index.php/Account&LogIn
demo with seo :
https://demo.clicshopping.org/demo/index.php/Search/AdvancedSearch ==> correct no ?
- index.php/Account/LogIn in demo below login form is 2 register forms while source code index.php/Account&LogIn is 1 form only.
==> 2 because there is one for customer in B2C and 1 with B2B, the approach is different, depending what you want exactly.
You can remove one if you want. (if I understand your question)
==> If you do not litke this, you can create your own login form if you want.
How to change breadcrumb Index » ClicShopping » Favorites to ClicShopping » Favorites : my shop in homepage so, Index in breadcrumb with "Index" is an abundance.
Look the files in ClicShopping/Service/Shop/Breadcrumb and comment (choose your line) this
For the catalog image
I do not understand your question, You have not use rm command, if you do that you can erase all the website if you are in the root ?
ClicShopping evolve day to day with minor version if bugs are discover.
The system allow you to upgrade without to change anything inside the code if you follow the best pratice.
Do not change classe : use the Custom Directory, u se Hooks, create new template, new module
think it is not enough for production now ==>I think you do not very well the solution, take time.
I hope this explanation is not to complicate.
Look the documentation : https://www.clicshopping.org/forum/forum/8-documentation/
Best pratice : https://www.clicshopping.org/forum/forum/18-best-pratices-tip-trips-and-training/
blog : https://www.clicshopping.org/forum/blogs/blog/3-clicshopping/