Hi there,
Was this ‘instructor’ certified by AutoDesk?
I have been using autocad electrical since January and managed to fumble my way through to make a set of drawings. When I wanted to tweak symbols to suit how I wanted them ie moving wire numbers on source and destination arrows etc, I altered the original block and saved over it.
The good practice would be to use the symbol builder. Take the out of the box symbol, explode it, use symbol builder to modify it, save it with a new name. Add this to your Icon Menu. The To/From arrows are a special case as they are hard coded, which is to say that when you insert a arrow ACE goes looking for a specific file name for the arrow, you do not have the chance to say which arrow you want to use. At least not in my experience.
I have now just finished doing an autocad electrical course and was told by instructor that my method was bad practice as when I download the new autocad it will replace all my libraries and won't find my tweeked blocks.
Installing the new version of ACE will not replace anything in my experience. I have 2014, 2016, 2017 and 2018 installed on one workstation. They all work independently. I seem to remember a funny thing with profiles crossing over but libraries are all in separate folders. If your custom symbols are part of your menu they can be pulled into a new ACE revision using the Migration tool.
I have a back up folder of the whole catalogue so that I can re insert into folder so won't lose altered blocks but he told me there was a way to change the environment file and that it was the good practice way. He then told me it was a complicated setup and then wouldn't tell me process as we didn't have enough time. Does anybody Ave any input to this and ever done it this way or is it more hassle than it's worth? I don't want to do things cowboy but was a bit difficult wary as to its benefits. Thanks for any help as always
Playing with the .env file has a lot of befits but you really need to understand what you are doing before you do it. With what you are asking here it sounds like you are looking to crack a walnut with a 10 pound hammer. There is a tutorial bundled with ACE that demos how to take a standard symbol and create your own rather than altering the original, and adding the new symbol to your Icon Menu. There is also info in the ACE Help and this board as to how you can Migrate all of your custom settings and symbols from an older ACE revision to a newer ACE revision.
How much did you pay for that ‘class’?
Good luck

Please mark as a solution if this works for you, kudos are always welcome