Can't activate for Adobe Acrobat that is already loaded on my computer

I'm self publishing a book and have used Adobe Acrobat twice so far. I now need it to edit another document . I am nearly at the end of this publishing process. Now when I try to activate Adobe Standard again the error messsage says I already have the program loaded on m comutoer and they say I 'already have the Annual Plan paid monthly in my account. But 'we are iunable to assign two licences of the same product to one account.'  But the program won't 'activate' for me to use it. I only want to use Adobe to edit for a day or so and after that I won't need it. I can't afford to pay a monthly charge for a whole year.  I'm nearly at the end of this process but I'm stymied by this glitch. HELP!