It's my first time to use registered version. I was downloaded and write all music after that i was deleted cause i didn't have a credit card whatever, i made a lot of files and tried to open but nothing appears. I wrote my own music can someone help how to open an old files thnks? I was using noteworthy composer 1.75 thnks again.
There is no reason you shouldn't open old 1.75 files in NWC 2.75a.
With "open" you mean dounble clicking on a .nwc file? Then the problem is in the file association in the windows shell.
Check by using, in NWC, file -> Open.
Something doesn't make sense here... You said you didn't have a credit card, how then could you possibly have downloaded a registered version?
You cannot get the registered version without paying for it first.
If you are a registered owner of a V1.75 licence then the upgrade is $15 USD but you MUST have a valid V1 licence, otherwise V2.75 is $49 USD.
Either way, you must first buy it before you get it.
I think you must have downloaded the demo version.
The demo version has several limitations:
If you deleted the files, they're gone.
If you didn't delete files you had successfully saved in the demo version, if you've recently switched to Windows 11 it may be trying to associate the files with NWC 1.75. You might try associating them with the current version instead.
This may not be accurate, but I had some difficulty getting Windows to open my NWC in version 2, it kept opening 1.75 and telling me the version 2 song files had been created on a later version of the programme and couldn't be opened in 1.75.
You can't save anything in the demo version, and if he didn't pay for the full version (no credit card) then he can only have been using the demo.
Not sure what's actually going on, but OP hasn't logged back in since the original post.