It will work, you can download and reinstall the Axcrypt software and use the same password as before.
No need to decrypt all files and again encrypt the newly installed AxCrypt.
AxCrypt app encrypt file(s) with the .axx extension. AxCrypt encrypted files have their own file structure and AxCrypt app only can interpret and open those file(s). That’s the way AxCrypt was designed.
Still, you are asking any issues, please provide more information about the issue and write a mail to firstname.lastname@example.org.