Thanks to everyone for your opinions. If I put myself in Hitler's place on April 1, 1945, the overall situation is extremely bleak...

On the eastern front, the last German resistance along the Oder River is eliminated on this day and the Soviet forces are preparing to cross in force.
Brataslava (the capital of Slovakia) and Vienna (capital of Austria) are being attacked. In East Prussia, Konigsberg is under attack.

On the western front, American troops (1st and 9th Armies) link up at Lippstadt and seal the Ruhr pocket trapping 325,000 German soldiers.

My decisions...use the bombs on major enemy cities (Moscow, London) or on front-line troop concentrations. After deliberation, I would implement the following plan:

Day 1 - Send high-level bomber with half of all available fighter escorts toward Moscow. Plan would to be destruction of that city and the Soviet government and military nucleus.
Later that day, send another bomber with remaining escorts to destroy London.

Send communications to Zhukov and Eisenhower that their leadership has been destroyed and other bombs will be delivered unless their is an immediate withdrawal of all Allied armies to behind the Rhine (in the West) and behind the Vistula (in the East) with a ceasefire in place along all fronts including Slovakia, Hungary and Austria.

Day 2 - If Allies agree to withdrawal and ceasefire, no other bombs would be utilized.
If Allies do not agree to terms, 2 more bombs would be used in a tactical fashion to destroy large army concentrations on each front.
Target 1 - Most dense Soviet troop concentrations just east of the Oder.
Target 2 - Same thing near Lippstadt against American forces sealing the Ruhr Pocket.
Again, issue the same demands as before.

Day 7 - Depending on situation, I still have one bomb in hand. More than likely, Allies would sue for peace and Germany would negotiate new territory including the old Reich territory plus Poland, Austria, Czechoslovakia, Hungary, Balkans, Romania, Bulgaria, Greece, Holland, Italy and Belgium. Let France go independent but reinstall Vichy regime.
If Allies refused to ceasefire and kept advancing, the last bomb would be planted in the center of Berlin and detonated when Allied troops occupied the capital resulting in a grand Wagnerian apocalypse.